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“Secret” Firmware lets Late ’08 MacBooks use 8GB.

Every once in a while, a blip on the radar comes up, letting us know that there’s something not quite right in our little corner of the Mac Universe. This time around, it came in the form of Tweets directed to us, as well as in posting in popular Mac forums.

As it turns out, several other memory vendors—along with some Late 08 MacBook/MacBook Pro users—have laid claim to these machines working with 8GB of RAM. This was contradictory to our testing in December 2009 which quite clearly showed that while these models recognized a full 8GB, if an application addressed more than 6GB, the system would slow down significantly.

Not being the type to just let these sorts of claims to go unchallenged, we went back to our testing lab, grabbed the affected model machines, running 10.6.6. and dropped an 8GB upgrade kit in them.

Related: See All Upgrades Compatible with Your Mac with My Upgrades Tool

The results were exactly the same as in 2009, lending credence to our conclusions, but the sheer number of claims to the contrary led us to continue searching—and the trail ended at Apple.

In late 2009, an EFI Firmware Update was released to address the buzzing noises coming from the optical drive. However, it seems that somewhere along the line, Apple changed this update without notating it anywhere.

Whether any other elements were affected by this change is undetermined, but it did change memory addressing; with the later version of the update installed, you could address a full 8GB in Snow Leopard. Unfortunately, Software Update doesn’t show this version as being different from the previous one, so users wouldn’t be notified if they had already updated their firmware to the older version.

The practical upshot of all this is that if you installed the EFI Update when it first came out, like we did, you would have gotten the old code, which meant your computer would only address 6GB properly. Those who didn’t upgrade until after Apple changed the updater got the newer firmware, which allowed proper addressing of 8GB.

Once we manually installed the “updated” version of the EFI Firmware in our test machines, they were able to address 8GB normally, without any crashing or slowdowns.

How do you ensure your Late ‘08 MacBook/MacBook Pro can address 8GB of RAM?

First, you want to make sure you have one of the affected models:

  • MacBook 13.3″ 2.0GHz and 2.4GHz
  • MacBook Pro 15″ 2.4GHz model w/ExpressCard Slot
  • MacBook Pro 15″ 2.53GHz model w/ExpressCard Slot
  • MacBook Pro 15″ 2.66GHz model w/ExpressCard Slot
  • MacBook Pro 15″ 2.8GHz model w/ExpressCard Slot
  • MacBook Pro 15″ 2.93GHz model w/ExpressCard Slot

Next, check the Boot ROM Version in your System Profiler.

  • MacBook Pros with a Model ID of MacBookPro5,1 should have a Boot ROM Version of MBP51.007E.B05. 
  • MacBooks with a Model ID of MacBook5,1 should have  a Boot ROM version of MB51.007D.B03
  • Machines with other Model IDs are not affected and don’t need an update.
  • **IMPORTANT NOTE: EFI Firmware Update 2.8 was released on February 28, 2012 for the Later 2008 MacBook Pro. If you have installed that update, your Boot ROM version will be MBP51.007E.B06. If you have this update installed, you’re already able to install the 8GB without any problems and don’t need to perform further updates to install more RAM.

If your Boot ROM version does not match the numbers above, download the appropriate firmware updater for your model machine and install according to the instructions:

Once you have ensured that the Boot ROM is the correct version, make sure your Operating System is updated to OSX 10.6.6. You must be running Snow Leopard or later to address 8GB on these systems, and our testing was done with 10.6.6, which is the earliest version we’re currently supporting for this.

Pardon us for our initial skepticism on this larger memory capacity finding. We had some pretty good reasons for it. First, this is the first time in our recollection that an EFI update and a dot version OS update both combined to affect memory addressing. Secondly, this reminded us of when after we were the first to qualify 2007-2009 Core 2 Duo MacBook Pro and MacBook models supporting 6GB max without experiencing a dramatic system slowdown, certain memory resellers pushed the same idea about 8GB compatibility.

Or in other shorter words, if we can’t prove either benchmark performance gains and/or system stability, we’re just not going to market a memory upgrade just to pad our MaxRAM credentials.

Your trust in us is more important than any other objective here.

UPDATE – FURTHER CLARIFICATION

Judging by the sheer number of comments, there seems to be some confusion as to which MacBooks and MacBook Pros this update applies to. We’ve created a simple flowchart that should help clear up some of the confusion.

UPDATE: FEBRUARY 2012

EFI Firmware Update 2.8 was released on February 28, 2012 for the MacBook Pro, to resolve graphics issues. It does not disable the 8GB compatibility the previous firmware revision granted.

Related: Now is the time to upgrade your memory with OWC!

M. Chris Stevens
the authorOWC Chris S.
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989 Comments

  • Note that in addition to the listed models, MacBookEFIUpdate 1.4 allows a MacBook5,2 (Mid 2009) to use 8GB RAM. After update, the boot ROM version is MB52.088.B05.

    I should also mention that not all brands of DDR2 RAM will boot in a Mac. Some PC RAM isn’t recognized. If your Mac is beeping every 5 seconds, the RAM isn’t recognized, and your Mac thinks there is none installed. Buy RAM tested for Mac compatibility.

  • Hi, similar situation as Jhon here, but my mac is a A1286 late 2011 15 inch. Mac OS High Sierra 10.13.6 Boot ROM Version: 87.0.0.0.0 . Downloaded the MacBook Pro EFI Firmware Update 1.8 but won’t install on the computer. any tips?

  • Hi guys!
    My MB 13, late 2008, runs OS X El Capitan, with boot ROM MB51.007D.B03.
    With 8gb the computer won’t turn on & beeps 3 times in succession.
    The EFI update for MB 5,1 won’t install on the computer, so I’m left thinking that I need to downgrade my OS?
    Any thoughts please about this?

  • Hello
    I have a Early 13 inch Macbook 4,1 – 2.1 Intel Core 2 Duo with 4 GB 667 MHz – my question will this firmware upgrade work in the Early model I have?

  • This article is really what I was looking for! Thank you! I am upgrading my daughter’s computer thanks to you!
    May I ask you a question: what about upgrading a MacBook Pro 2,2 (2006, A1211), Mac OS X 10.7.5, to 8GB of memory RAM? Or at least 4GB? The boot ROM is MBP22.00A5.B07GB. Is is worth it?
    Thanks for your help!
    Cordially,

  • hello …

    how do I install an efi uodate on my new ssd ?

    when I start my mbp unibody it will show ( ? )
    with the alt key it will not show any thing ….

    after putting an efi file from a linux knoppix
    and alt > it will show a windows hdd …
    to put the pointer on
    and press

    then the screen goes black
    then after more then a minute
    a gray screen starts
    and the message >

    ” Remove data carrier
    restart: press any key ”

    can I copy the mac efi update 2.8
    directly in the > efi partion ?
    of this san disk 120gb ssd

    and how can I install a smd update ?
    before installing os 10.5.6

    .

  • Late 2008 Macbook 5,1 MB51.007D.B03 SMC Version (system): 1.32f8. Installed 2 x 4GB Ram one slot reading and the other says empty. Reinstalled the 2 x 2 GB Ram both slots work fine. Am I missing something on installing the RAM to have 8GB?

  • I have an 08 15 inch MacBook Pro that I upgraded RAM to 8GB and installed a 480GB SSD. The 11 year old machine is very spry now. Boots up in 28 seconds and moves through applications swiftly. I use it as the media server for my home network. Got all my information and supplies from OWC/MacSales. They have kept ALL my Macs running for 11 years now.

  • I’m trying to update my firmware on MacBook 5.1, is there a way to do this? The download link on Apple doesn’t work.

  • Hi everyone; I have a MacBook Late 2008 with Boot ROM version of MB51.007D.B03 however when I download **For MacBooks (MacBook5,1) MacBook EFI Firmware Update 1.4** it says **This computer does not need this update.** What’s the problem you think? Thank you!

  • Have a late 2008 unibody Macbook with Boot ROM Version: MB51.007D.B03 and SMC 1.40f2. Would upgrading to 8 GB work here? And what would be the highest OSx that one can run it with for 8GB to work properly? The laptop is currently on 10.7.5 and I am hesitant upgrading it to 10.11 if 8 GB do not work on it. Which lower OSx version would support 8GB? Thanks for your help.

  • Hi there, I’ve been trying to do this for a while. I have a MB late 2008 with:
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8
    And i’ve 2 4gb ram but it shows like i’ve only 2 2gb ram. I am funning osx 10.8.5 with and ssd and I would love to upgrade the osx, how can i fix this?
    thanx in advance.

  • After installing MacBook EFI Firmware Update 1.4, each time the computer is booted it displays a popup notification informing me that the firmware has been updated.
    Does anyone know how to disable this?

  • I just did it, now my MacBook 13 inch, Aluminum Late 2008, Processor 2 GHz intel core 2 Duo is showing the 8 GB 1067 MHz DDR3,
    it’s working.

    • sorry, can’t find an option to delete this. found the answer in the comments. just took some time as there are a number of them. there are claims that 1333mhz works. I ordered it and waiting for it to be delivered.

  • I’ve got an MBP unibody, late 2008, and it takes 8GB, no problem, in fact, it did back in 2010, before the update. I highly suggest that anyone with a model this old keeps a 10.6.8 partition, since anything newer runs INCREDIBLY slower. If you need support for newer apps, run 10.10.X, anything newer is WAY too slow. 10.9 is actually the slowest of all. Don’t even bother with Lion or Mountain Lion, and forget 10.11 and 10.12.

    I’m a bit confused by the article. My friend has a late 2008 Macbook 4,1. I read that Apple’s official specs say 4GB, and some other sources say 6. I know from years of experience that Apple always lowballs it. But, does article mean that it can indeed take 8? If i put in 8, and it doesn’t recognize all 8, will it just not boot, or will it run as if it only had 6?

  • So i have a aluminum body late 2008 macbook, model ID MacBook5,1 and Boot ROM version of MB51.007D.B03 but for some reason when i tried to upgrade to 8GB of ram my macbook won’t start i get an error msg and tries to restart again. any ideas on what the issue could be???

  • Hi there :)
    I just acquired a MBP 17″ A1261 2.5 Ghz 4Gb 250gb 1920×1200 10.11.5 OSX El Capitan.
    I’m new to all this and would really appreciate your help. :) I will mainly use it to move my daughter’s choir performances, church worship (4 years’ worth) from the cloud to cd’s for grandparents, and pictures of trips from the cloud to cd – and create family videos and watching movies/videos with family aside from work and adding music. Before I start putting anything on it, should I upgrade it to 6gb or 8gb? How should I do it – where should I get help? Also – 250gb might not be enough to hold all of these – so should I upgrade that as well to 500gb? Will that slow the computer down? How much does all of these cost?
    Thank you so much for your help!!! I need some guidance and help :) !

    • Hi, Caroline. To get the best performance from your Mac, we highly recommend installing the maximum amount compatible with your model. And if you would like a large amount of storage that will bring better performance to your Mac, an OWC SSD will do wonders for your Mac. Our My Upgrades tool will show you exactly which upgrades are compatible with your Mac. It can be found here: https://eshop.macsales.com/upgrades/. You can also reach out to our helpful customer service team for additional support. Thanks!

  • Hardware Overview:
    ——————–
    Model Name: MacBook
    Model Identifier: MacBook 5,2
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB52.0088.B05 (EFI 1.4)
    SMC Version (System): 1.38f5
    Serial Number: W8915F934R1
    Hardware UUUID: 86402231-7C6A-578E-A7D8-00ABABE4F83C
    Sudden Motion Sensor:
    State: Enabled

    OSX 10.10.X (Yosemite)
    ——————————————-

    Can I upgrade from 2 GB to 8 GB of Memory or limit myself to 6 GB? Seems to be two different school of thought as to what the max memory should be for the MacBook 5,2.

  • Loved this article.
    I’ve had a 2008 MBP since new and love it.
    Installed SL over 10.5.5 Leopard just to use certain connectivity and think it’s great.
    The old stock RAM is getting wonky with SBOD and suspect the RAM.
    The firmware, as with all apple products, is the key.
    I am ordering 2x4g Crucial and revamp a classic oldie lapper.
    Thanks again for the writeup and comments here..

  • Hi, I have a MBP version 5,1 running 10.11.6 with Boot ROM Version: MBP51.007E.B06. I can only upgrade the ram to 6 GB, 2gb in one slot and 4gb in another. When I try 8gb it beeps and won’t boot. What is the reason? Is it the make of RAM?

      • I have the same issue as Bevis, but my macbook is the MB 5,1 with the boot ROM MB51.007D.B03 and running El Capitan.
        I can have the 2G+4GB but not the 4GB+4GB.
        Did you managed to fixe it?
        Thanks

        • same issue as Francisco. I have the late 2008 unibody, running MB51.007D.B03 and it will only let me use 6GB of RAM, 2 in the top slot, 4 in the bottom. Ram is Crucial 4GB DDR3 1067 and it just beeps when I try to boot with 8GB installed. Not sure if 6GB is faster than the 4GB since its mismatched.

          • Also should note im running OS X El Captain version 10.11.6
            From the looks of other comments on page 8, this is likely the issue and I haven’t seen a fix noted in past responses. Might need to look into downgrading the OS and trying again

  • Thank you for the information to upgrade to 8 GB. I have a late 2008 aluminum macbook. It has the same Boot Rom version you stated in your great article… I’m running “lion” 10.7.5. Do I need to upgrade to El Capital first? Or I can I upload the 8GB with “Lion” as of now. Planning to upgrade to El Capitan (or newer versions that can support this laptop) – but should I upgrade the GB’s now or do suggest upgrading to El Capital prior to installing the 8 GB? Thank you so much for any feedback you can give. Lastly, may be a stupid question, but do I need to check for the EFI firmware? I think that’s the Boot Ram I now have that you suggest prior to installing 8GB. Hope I”m making sense. Thank you again!

    • Thank you so much for your questions. As you have the MacBook 5,1, have matched the Boot ROM version and running 10.6.8 or later you will be able to upgrade to 8GBs without any problems. We suggest that you upgrade the RAM before upgrading to El Capitan.

      Please let us know if you have any further questions.

  • Hi,

    I’ve got a MacBook 5,1 2008 Late. 2GHz with 4gb RAM. Boot ROM Version: MB51.007D.B03.

    I’m running El Capitan.

    If I try to install the 2.8 firmware it says “The computer does not need this update”

    Can I still put 8gb ram into my macbook? Will it work?

    Thanks

    • Thank you for your question! You will still be able to upgrade to 8GBs of RAM!

      Please let is know if you have any further questions.

  • Hi I have a 13 inch Max pr (mid 2009) with 4GB 1067 MHz DDR3. I have just updated the OS to 10.11.6. Can I upgrade to 8GB RAM? If so which prodcut would I need to do this? Could i just get another 4GB such as this: macupgrades.co.uk/store/product_info.php?products_id=953

    Many thanks

  • Hi,I have followed your instructions but it doesn’t work for me. The laptop doesn’t load, it switches front light but it doesn’t goes on. If you can help me. My version is 10.11.6 Thanks

  • Hey! Nice article. I just pulled my old macbook out of storage and am refurbishing it to use as a music interface. I had all this set up already and am running 8GB RAM, but I stayed on 10.6.6 because at the time when I was doing this upgrade I was told that if I go PAST this that the upgrade would cease to function properly and I would go back down to 4-6GB. Is this true? I really want to upgrade this laptop for use with newer programs, but I don’t want to lose my 8GB, Obviously. And on another note, what’s the best(highest) OS I should go too with this 5,1 Macbook. Thanks.

    • I have asked efficiently, becauseI have read that I can install 2x4GB, but if more than 6GB is accessed, performance drops of a cliff…
      So…. Is 5,2 OK for 8GB, or should I go to 6GB?

      • Thank you so much for your question. In the MacBook 5,2 the maximum amount of RAM you will be able to use is 6GBs. We would not recommend going any higher.

        Let us know if you have any further questions.

  • So my mac meets all of the above criteria. Can someone direct me to the precise product I need to max out my RAM? From what I can see I need 2 x 4Gb. Thanks a mil. Great article. very clear for those of use with novice tech literacy.

  • I have a [Apple MacBook “Core 2 Duo” 2.0 13″ (Unibody)] (i checked with EveryMac). Currently it has 2x2GB, which works. The OS version is 10.11 (El Capitan). When I try to use a Kingston KVR16LS11/4 [https://www.kingston.com/dataSheets/KVR16LS11_4.pdf] (4GB), the Mac emits [3 successive tones, a 5 second pause (repeating)]. System Profiler/Boot ROM version is MB51.007D.B03.

  • hi, I have a MacBook5,1, with 4G ram and a500 SSD, the numbers I get are: MB51.007D.B03.
    can I install 4 more Gs of RAM? I tried installing the EFI update but i get a message saying that my computer has no need of this update..

  • I’m trying to figure out if the MBP 15 inch I have is able to handle the 8 GB upgrade. The Boot ROM version is MBP53.00AC.B03. This appears to be the latest version available. Will this still work?

    • Thank you so much for your question! Your 15″ MacBook Pro will be compatible with 8GBs of RAM with Boot ROM version MBP53.00AC.B03!!

  • This blog is awesome!.
    I am on a late 2008 10.9.5 with 2+2ram and firmware MB51.007D.B03
    I am giving this girl a revival. New SSD and maybe new batt.
    On firmware update Feb 28, 2012 I get Alert “This software is not supported on your system. ”

    The philosophical question : Should I buy 4+4 ram together with new SDD drive and cruise in 10.9 for eternity?

    • Hi, Agustin! Thanks for the kind words. And you will definitely be able to extend the life of your late 2008 MacBook with more memory, an SSD, and a new battery. To help find the compatible upgrades for you, I suggest using our MyOWC search. There you can find the proper SSD, RAM and battery for your MacBook model. And if you have any questions, feel free to contact our https://eshop.macsales.com/Service/
      !

  • I’m on El Capitan, late 2008 with MB51.0073.B06 ROM. Start-up freezes at around three-quarter of the bar (apple logo load screen) when I use two corsair ram units (2x4gb). When I use 1x4gb, 1x1gb it works just fine. Do you know how to fix this?

    • Same thing happened to me… I updated the ROM to the version that supports 8GB (I believe MB51.007D.B03)- it worked thereafter. This is for the Macbook 5,1 – aluminum version (late 2008)

  • With the last version of El Capitan my macbook only uses max 6GB of the 8GB avaliables inside. This only happen with the last version, since 2012 I´ve been using those 8GB…
    Anybody knows what happened??
    Thanksn in advance

    • Did you ever figure out a fix?

      I’m on El Capitan, MBP Late 2008 with MBP51.007D.B06 ROM and 8gb I get 3 consecutive beeps. 6gb works just fine.
      I’ve reseated RAM, checked both new sticks, PRAM reset, SMC Reset, etc.

      • I have a MB aluminium late 2008 (MB51.007D.B03).
        I have 8GB since 2012 but my computer only uses 6 of them since last El Capitan update, nothing about beeps…

    • Having the same issue here. 6gb works just fine , but once I insert 8gb I get the triple beeps.

  • I tried upgrading after downloading the firmware update to my MacBooks (MacBook5,1) but, it reads “this computer does not require this update”, event hough my current firmware is MB51.007D.B03 and I am running on el capitan.

  • Hello,
    My Boot Rom version is MB51.007D.B03. But when I attempt to install the update to my macbook(macbook5,1), a windows pops up that states “This computer does not need this update”. I am currently running el capitan version 10.11.15.

  • Good Day to you, was planning to sell my Macbook til i saw this thread, might be keeping it for a while for now, here’s my specs:

    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

    Kindly let me know if i can install 8gb RAM on my baby.. Cheers.

  • Hello,
    I have MacBook 13 inch Aluminium Lte 2008, 2,4 Ghz and boot rom version MB51.007D.B03 / macbook5,1.
    It is possible to install 8GB ram on this macbook?

  • Hi there,

    you wrote:

    “Whether any other elements were affected by this change is undetermined, but it did change memory addressing; with the later version of the update installed, you could address a full 8GB in Snow Leopard. Unfortunately, Software Update doesn’t show this version as being different from the previous one, so users wouldn’t be notified if they had already updated their firmware to the older version.

    The practical upshot of all this is that if you installed the EFI Update when it first came out, like we did, you would have gotten the old code, which meant your computer would only address 6GB properly. Those who didn’t upgrade until after Apple changed the updater got the newer firmware, which allowed proper addressing of 8GB”

    So how do I know, if I have the old code of the >>first<< EFI-Update 1.4, since you say both the first update and the new EFI-Update 1.4 from 08.12.2009 do both show ROM MB51.007D.B03 for my MacBook5,1 ?

    I don't know, if the previous owner of this MacBook had done the first EFI-Update like you did, which only addressed 6GB?

    Here my specs:
    – MacBook5,1
    – 2 GHz
    – 13"
    – MB51.007D.B03
    – SMC: 1.32f8

    Thanks for your help
    Spoogy

    • Hello Spoogy,

      Your Boot ROM Version is correct and compatible! You’re already able to install the 8GB without any problems and don’t need to perform further updates.

      If you have any further questions, please contact our Technical Support Team!

    • Hello Spoogy,

      Your Boot ROM Version is correct and compatible! You’re already able to install the 8GB without any problems and don’t need to perform further updates.

      If you have any further questions, please feel free to contact our Technical Support Team!

      • Hi Dyllon, thanks for your reply.

        But I wanted to know something else :-)

        This article said, that they had previously done the first EFI update 1.4 and could only handle 6 GB, even that the ROM Version showed MB51.007D.B03.
        Only after they manually did the EFI update 1.4 again, which was silently updated by Apple, they could handle the 8 GB, event the ROM Version still showed MB51.007D.B03.

        So how can I know, If I got the old MB51.007D.B03 or the new MB51.007D.B03 ?

        I hope I could explain it clearly.
        Thanks for your help!
        Spoogy

        • Hello Spoogy,

          We are very sorry for any confusion that has been caused. If you have Boot ROM version MB51.007D.B03, you will have the correct version for the 8GB upgrade kit. In the article when it states there was an older and a newer version that you can not tell the difference between, this was before Boot ROM version MB51.007D.B03.

          To double check you can use the most up to date MacBook EFI Firmware Update 1.4. If this update does not work and states it is not needed, you will have assured that it is the correct one.

          Please contact us if you have any further questions! We will be happy to help!

  • I have a late 2008 MacBook 5,1; 2.0 GHz; 2 GB; Boot Rom MB51.007D.B03. I am running OS X 10.5.8. I want to install 8 GBs RAM, and then start process of upgrading to latest version of OS X El Capitan. Can you please advise if this is an OK order to make the transition run smoothly?: 1. Upgrade to Snow Leopard, 2. Install 8 GBs, 3. Upgrade to El Capitan. Also, can you please advise on an SSD and where that potentially fits into this scenario. Thanks!

  • I have a macbook same late 2008 aluminium version but i need to know the maximum speed and Hertz of memory i bought some hyperX but they don’t work but i have more just need specs i am already running OS 10.9.5 on A SSD Hard drive need help to maximum memory

    • Hello Jamar,

      The maximum amount of RAM that you are able to have in a late 2008 MacBook will be 8GBs. The specs will be PC8500 DDR3 1066MHz 204 Pin.

      If you have any further questions, please contact our Technical Support Team!

  • Hi, I have a macbook 5,1 late 08 2.4 GHz. It has the ROM version of MB51.007D.BO3. It has 4GB of RAM and running on EL CAPITAN. When trying to download the EFI File, I get the error saying I do not need this update. Any idea on what to do?

  • I have macbook 5,1 late 2008 13 inch 2.0 GHZ aluminum. it has the latest Boot ROM version of MB51.007D.B03. it runs latest EL CAPITAN. I installed 8GB (2X4GBs) PC3-8500 DDR3-1066 mhz. I still have no luck, it beeps and doesn’t boot on start. Any advice please?

  • i have a macbook pro 2008 model,, id is macbook pro 3.1,, so according to the above graph this article doesnt apply to me, does that mean i can or cannot install 8 gigg, i currently have 4 gigg and have just upgraded to el capitan.. heres my spec,, help appreciated Model Name: MacBook Pro
    Model Identifier: MacBookPro3,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 4 MB
    Memory: 4 GB
    Bus Speed: 800 MHz
    Boot ROM Version: MBP31.0070.B07
    SMC Version (system): 1.16f11
    Serial Number (system): W87350T4X92
    Hardware UUID: 00000000-0000-0100-8000-001CB3A0C942
    Sudden Motion Sensor:
    State: Enabled

      • ok thankyou, how would i install gigg, would i put a 4 gigg and a 2 gigg in ?does it matter witch slot ? Is there not a way way to update my firmware to allow 8 gigg?? Thankyou

        • Yes, first install the 4GB chip and then the 2GB chip. Be sure to check out our line of installation videos for additional instructions.

          And 6GB is the maximum amount that is supported by your MacBook model. Let us know if you need any more help. Thanks!

          • Si cannot liek change the firmware to get 8 gigg, no ? but i can have 6 gigg ye ? i think in it now is 2 2 gigg slots by looks of it,, do you know what I need to buy, liek a 4 gigg an a 2 gigg i gues, but what are these called, sorry im clueless,, maybe i could email you direct to your customer services, sorry im a bit cluless.

  • Hello, I have a late 2008 macbook pro with rom MB51.007D.B03 and I have installed both 4gb memories succesfully, however I cant install the EFI update I get the error “This software is not supported in your system” I am using El Capitan 10.11.3, am I still required to install the update to have the memory properly working? Thank you.

  • i’m using macbook 13 inch late 2008 Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

    but this ram (Kingston DDR3 1600mAh 4GB Low Voltage Ram) causing it to make 3 beeps sound during booting

  • I have late 2008 Macbook MB51.007D.B03 with 2gb ram and I wanted to upgrade to 8gb but it keeps crashing on me I tried all the kernels upgrade but it says that this laptop doesn’t need one any ideas
    Thanks

    • Hello Matty,

      You will want to make sure that you first have a compatible MacBook. Only the late 2008 MacBook (5,1) will be compatible, not the late 2008 MacBook (4,1).

      Please contact our Technical Support Team and we will be happy to look into this further with you!

  • I have late 2008 Macbook MB51.007D.B03 with 2.4 GHz and 4GB RAM. I would like to upgrade to 8GB RAM. When trying to install firmware EFI 1.4 says
    computer does not need firmware update. 1) How do I go about purchasing and installing the 8GB RAM and 2) will this affect any Applecare /warranty issues?

  • Hello, I have the correct software, a late 2008 macbook 5,1, snow leopard 10.6.8, MB51.007D.B03 with 2.0 ghz. I installed two sticks of 4 GB ram (correct DDR3) and it just gives me a series of 3 beeps. I tried resets, cleaning, ect. and nothing works. If i leave in the old 2 gig with the newer 4, it will work off 6. Any suggestions?

  • Hi! I have a MacBook aluminium 13,3 late 2008 with MB51.007D.B03 and Yosemite os.
    I installed 2x4gb samsung ddr3 1.333 Mhz 1.5v. The macbook works very fine but when the it uses more than 6 Gb something strange happens. For instance, the images opened by photoshop start to appear corrupted. I tested the 2 ram banks with my other new windows laptop and they work perfectly in every situation. In your opinion the efi is bugged or the issue is related to 1.333 Mhz frequency (instead of the 1.067 Mhz) of the ram I used?

    Thank you!

    • Hello Stefano,

      This does seem to be more of a hardware problem then a firmware problem. At OWC we only recommend the use of 1066MHz RAM in the late 2008 MacBook (5,1).

      Please feel free to Technical Support Team if you have any further questions.

  • I think all the confusion is due to the “IMPORTANT NOTE” because it makes it look as if that is the ONLY relevant info that supersedes all that comes above and below it and if your BOOT ROM doesn’t match that version, than you won’t be able to use the 8 GB of RAM.

    Also, the bullet point list is confusing because the 4 bullets are not part of a list (the third one down certainly doesn’t).

    I would suggest you removed “Important note” and rephrased what follows to emphasize that if you have ANY of the boot ROM listed than you are good to go.

    Also in the following paragraph, repeat that MBP51.007E.B05, MB51.007D.B03 and
    MBP51.007E.B06 are ALL OK.

    At the moment the way I read it is that only the LAST version is correct.

    The “Further clarification” doesn’t help either as it stands. To clarify it list in the flow chart the versions that are supposed to work.

  • I have Model ID 5,1 and the boot ROM version mentioned in your **Important Note above. I tried to upgrade my RAM to 8 GB with two 4 GB SODIMM PC3-8500 memory boards but all I got was beeping when I attempted to boot my Mac. Why?

  • Hi. My macbook aluminium late 2008 its ok in firmware.
    Which is the maximum allowed mhz in ram for my mac?
    currently works on 1066mhz

  • Hi When trying to install firmware EFI 1.4 says
    computer does not need firmware update.

    Macbook alum late 2008 OSX EL CAPITAN
    Boot Rom Ver. MB51.007D.B03
    SMC VER. 1.40F2
    Thanks.

        • HI This i what I got
          Macbook alum late 2008 OSX EL CAPITAN
          Boot Rom Ver. MB51.007D.B03
          SMC VER. 1.40F2

          I did not install any firmware and I was able to upgrade the Ram to: 8GB Kit 2×4 GB SO-DIMM 1333 MHz PC3-10600 DDR3 Memory (M471B5273DH0-CH9)
          So far I don’t have any troubles my mac is running smooth,purring like a little kitten.
          Thanks Mr. A.H.

  • My Macbook Pro keeps saying “This computer does not need this update.” whenever I try to install the firmware update. It’s a 15” late 2008
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.33f8

    Anyone has an idea why this is happening?

    • Hello Ghana,

      If you have Boot ROM version MBP51.007E.B06 you’re ready to install 8GB without any problems and don’t need to perform further updates to install more RAM.

  • Hi,
    I am a bit confused. I have a MacBook 13.3″ (late 2008). The boot rom version is:
    MB51.007D.BO3. Can I install the “OWC 8GB Memory Upgrade?”

    I downloaded Apple’s EFI 1.4 Firmware Update. When I run it the message is: “This computer does not need this update.”

    Can I install the “OWC 8GB Memory Upgrade?”

    Sincerely,
    Sy Bensky

    • Hello Sy,

      In order to upgrade to 8GBs of RAM you will need to run the MacBook EFI Firmware Update 1.4. We are very sorry to hear that the EFI did not work for you at first. We would recommend to disconnect non-essential devices and use only the manufacturers keyboard and mouse to apply the update.

      We would also recommend to quit all open applications and try the download again.

      If this does not work, please feel free to contact our Technical Support Team!

      • Hi Dyllon,

        Thanks for the reply.

        I downloaded the EFI 1.4 firmware update, again.

        I reboot the MacBook. There are no programs running, or peripheral devices attached.. I am using the built in monitor and trackpad. Same message: “This computer does not need this update.”

        I am running El Capitan 10.11. Of 4.0GB of installed memory, OSX uses 2.4GB leaving only 1.6GB free. Could this be the problem?

        Sincerely,

        Sy

          • i can see two replies that doesn’t make sense, you have the latest firmware mentioned in the article (MB51.007D.B03) which is needed to run a 2x4GB kit of DDR3 1066MHz, don’t buy faster or low voltage ram coz they would not work. NO UPDATE IS NEEDED

  • I have the late 2008 macbook 13,3″ and was going to install the EFI update to upgrade to 8gb capacity. Unfortunately the installer tells me that I dont need to install the EFI. I checked the System profiler and it tells me that I have the MB51.007D.B03. Why can’t I install the EFI?

    I’m on OS X Yosemite 10.10.

    • Hello Andrea,

      We are very sorry to hear that the EFI update is not working for you. We would recommend to disconnect non-essential devices and use only the manufacturers keyboard and mouse to apply the update.

      We would also recommend to quit all open applications and try the download again.

      If this does not work, please feel free to contact OWC!!

    • Hi Andrea
      you don’t need to upgrade firmware
      your mac is ready for 8GB OF RAM
      read my comments on top.

      Mr.A. Hernandez

  • Have the late 2008 macpro and Was going to upgrade to 4gb until I saw this. Was wondering if I go with 8gb and it is unstable can I simply uninstall it and go back without damage?
    I am running yosemite and seem to meet all the criteria that you listed. Still a bit nervous.

    • I have been running with 8 GB for three years and it has been fine. El Capitan has beach ball taxed, my Macbook Pro 15 on occasion but usually because I have left too many apps open.

    • Hello Susan,

      If upgrading to 8GBs does not work for you, there is no problems going back to the 4GBs or 2GBs. That being said, upgrading to 8GBs will only improve your computer!

      If you have any questions, please contact our Technical Support Team!

  • Hi,

    I have the following:
    – MacBook Pro
    – MacBookPro5,1
    – Boot ROM: MBP51.007E.B06.
    – OS X Yosemite 10.10.5
    = Upgraded RAM from 2GB to 8GB 1067MHz DDR3

    The system recognizes the 8GB memory, however the system is still slow and utilizing only 2GB RAM. In the Activity Monitor shows 1.75GB Memory used (App Mem: 707MB, Wired: 739MB), 1.21GB Cache.

    How can make the system use all of 8GB RAM?

    Thanks,

  • Am I correct to say that if I was to upgrade ram to 6GB on a Macbook 5.2; it wouldn’t have any issue running programs or keeping up with everything?

    • Hello Brandon,

      You are correct! Upgrading your MacBook 5,2 to the maximum amount of 6GBs will definitely improve the performance of your computer.

      If you have any further questions, please contact our Technical Support Team and they will be more than happy to assist you!

  • Hi, i have a late 2008 13.3″ aluminium macbook 2.4GHz with 2 GB ram, Boot ROM version MB51.007D.B03, currently on OSX 10.6.8 and i bought the 8gb ram kit (2x4gb), tried to install but the best it can do is one of the new 4gb plus one of the old 1 gb RAM cards. How can i fix this so it can accept both 4gb RAM cards?

  • HI,

    Ok, sorry if I am being dense, but here we go…

    I am actually not clear which patch, if any, I am supposed to download…

    My MB 5.1 has MB51.007D.B03 and is running Yosemite. Which firmware update am I supposed to download, the 2.8 as indicated at the end of your article? Reading the comments some folks seem to have run into problems with this, though and the support.apple website confused me even more.

    Thanks.

  • I use a Macbook Aluminium, 2008 13.3″ 2.0GHz and 2GHz, model mackbook 5,1
    I was running Yosemite and I had 2Gb of RAM.
    I decided tiu upgrade the memory to 8 gb (4×2) and then I installed The capitan and couldn`t be better.
    I dont have problems with it, but I have been reading about the same kind of Macbook runing on 16gb (8×2) Any news about it?
    Thank you.

  • I know this article does no address 2007 macbookpros3, 1. But, referencing this article here: https://discussions.apple.com/thread/3962859?tstart=0
    if our computer is booting with a 64 bit kernal, can it now use 8gb of ram instead of the maximum 6? I checked if my 2007 core 2 duo macbook pro was using a 64 bit kernel, and it is. Can I upgrade to two 4gb sticks instead of the 6gb total I have now?

  • Im going to have the 8gb ram installed as I have the correct boot rom running on my macbook 5.1 (MB51.007D.B03). I am on snow leapord now.
    Once I have the 8gm ram installed, will I be able to install yosemite? Will the upgrade to yosemite effect the boot rom and then render the 8gb ram unrecognisable?
    Sorry, non-techie here.

    • That is an excellent question. Everything should work smoothly and without issue.

      As long as you have 10.6.6 or later and the correct EFI you can install 8GB. You can then install Yosemite. Updating your OS may include an EFI update to a later EFI if one exists, but it will not downgrade your EFI to an older one.

  • I have a Late 2008 MB, wanted to see what would be the best ram to upgrade it with
    Hardware overview is below:
    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 1 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8
    Serial Number (system): W8905Y5N1AQ
    Hardware UUID: 90EA2DCF-43E0-508A-901EEF2733EF
    Sudden Motion Sensor:
    State: Enabled

  • Tried installing the MacBook EFI Firmware Update 1.4 for my late 2008 unibody Macbook, model id Macbook 5.1 and Boot ROM version MB51.007D.B03 – But Yosemite version 10.10.4 wont let me. Do I have to install an older OS to make it work, or is there a workaround?
    I have already updated to 6GB and installed a 500GB SSD, but wouldn’t mind pushing it up to 8GB, just to make it last a few more years.
    Would appriciate any good advice on the matter.

  • I recently bought a Crucial 8GB (2x4GB) DDR3 ram 1600MHz to install on my MB13inch 2008 late but it seems to be beeping.

    My Hardware overview is below:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.40f2
    Serial Number (system): W89151X78QT
    Hardware UUID: C3B32FF4-3ACF-5157-82DE-1874A451D870
    Sudden Motion Sensor:
    State: Enabled

  • I have a MB13inch 2008 late. Does this work if I install the newest version OS? OS X, Yosemite etc?

  • I have MacBook Pro (15-inch, Late 2008).
    Changed the HD to SSD 1 tb crucial & memory to 8gb.
    This one turns on and runs all photoshops and multiple apps (MS word with > 100 mb size file, acrobat, PP…) together at speed equal of new retina laptops. Only shortcoming is the heat which now is better with Mac Fan control.

    Bought this a little before thanksgiving in 2008, so actually getting into 8th year now.

    Never had this firmware issues as the mac took 8gb immediately without any glitch.

  • I’ve been following this thread for years. I have a 17 inch MacBook Pro, 2.5. I was happy to learn from here I could upgrade to 6GB max, from 4. If/ when I tried more… it would not work properly as previously discussed. Now I’m learning it can handle 8GB! My macbook is model MacBookPro4,1. (Boot ROM: MBP41.00C1.B03) Does this apply to me as well? Can I handle 8 gigs?

  • I have late 2008/early 2009 MBP running 10.6.8 and already had the required firmware installed (boot ROM MBP51.007E.B06). I’d originally planned to upgrade only to 4GB RAM because that’s the official max capacity according to Apple, but I found this site when I googled my model and “max memory.” Glad I did! My new OWC RAM arrived yesterday, and my 76-month-old MBP is now running smoothly on 8GB! I haven’t yet pushed it to use that much memory, but I have hope that when I do, it’ll be smooth.

    Next step: upgrade from Snow Leopard finally???

      • The Number is still correct – 7.75GB RAM is what the Operating System is granted, the remaining 256MB are allocated as Video Memory for the GPU to work with.

  • I have the late 2008 macbook and am now convinced that I need the RAM boost. However, what do you all suggest that i get installed? So far I found out that these two modules are compatible. I need someones expert opinion on which one to buy and install.
    1– Kingston ValueR DDR3 SO-DIMM 1066MHz 4GB CL7, 1.5V, 512Mx64, 204pin
    or
    2– 8.0GB OWC Memory Upgrade 2 x 4.0GB PC8500 DDR3 1066MHz 204 Pin

    • Hello Ahmed,

      We would suggest OWC RAM for a couple different reasons. The main reasons would be all OWC RAM meets and/or exceeds Apple/Intel specifications,fully compliant with JEDEC specifications and is RoHS certified. OWC also has a lifetime advanced replacement warranty. This means if the RAM ever has any issues you can always have the option to have a new set sent to you first.

  • I have installed both 4GB ram chips.. however, my hardware overview on the computer is only showing 4GB total? I have the firmware upgraded to the max, what am I doing wrong?

    • Try re-seating both 4GB modules making sure that the contacts are completely inserted into the sockets. If you’re still having an issue – try each 4GB module by itself to see if one of the modules needs to be replaced or if perhaps there’s an issue with one of the sockets itself. Please contact our Technical Support Team at 1(815)338-8685 via live chat or email and they will be more than happy to assist in further troubleshooting if both 4GB modules work or to exchange the failed module.

  • Hello, what a kick to discover I have a 4GB RAM MBP51.007E.B06, that could upgrade to 8GB! The beachball has been spinning ever since Yosemite. Now I only hope upgrading will bring enough juice to the MBP. Regards Joakim

    • Yes, it’s a whole new computer with 8gb. To beef it up even more, get an SSD drive and drive tray to replace the optical drive, and make your own Fusion Drive!

  • I finaly paid for a macbook that is not the first out of the box and be able to upgrade to 8gb yahoooo!!!!! it’s great all other times it was the first out of the box always problems thanks guys and gals yahooo again

  • Hello I have just upgraded my macbook silver late 2008 from 2gb to 8 gb crucial ddr3l 1066 mhrz what an improvement!!!! thank you again for your clear advise

  • Hello,

    I am looking for some feedback on issues I am experiencing with my late 2008 aluminum unibody Macbook. Here are the specs:
    Model ID: Mackbook 5,1
    OS: 10.10.1 (Yosemite)
    Processor: 2.4 GHz Intel Core 2 Duo
    Memory (stock): 2 GB 1067 MHz DDR3
    *Memory (current): 8 GB 1033 MHz DDR3
    Graphics: NVIDIA GeForce 9400M 256 MB
    Boot ROM Version: MB51.007D.B03

    I am experiencing sporadic Kernel panics after upgrading the RAM to 8 GB (2×4 GB). My boot ROM version is correct, thus I do not think I need the firmware update. Machine runs iTunes and iPhoto much faster than it did with stock 2 GB RAM, but now goes into Kernel panic either out-of-the-blue, when I try to come out of screensaver mode, or when I am using Chrome while iTunes is downloading/updating.

    Any advice on this issue or ideas on what’s going wrong are highly appreciated!

    • Hi, I just checked my MacBook and it has 2x4gb 1067mhz DDR3 fitted… I hope the issue is not caused because yours is only 1033mhz… :(

      • Bus speed on my machine is 1.07 GHz. The RAM I purchased claims to be 1066 MHz compatible. This is actually the second set of 4 GB sticks I’ve tried. Exchanged the first set after determining them to be faulty. These ones have worked a lot better so far, it just seems like the machine gets overworked and Kernel panics.

        Hoping the issue isn’t just from buying cheaper RAM :(

        • Hello,
          I had the same issues when upgraded to MC Aluminium late 2008.
          I purchased 2x4Gb from Kingston. I had to send the memory 3 times until i got a kit that had no problems. The first 2 were failed. I have been using it for 16 months…smoothly.

          This is my mac: SN W8845AZP1AX
          Memory: Kingston ValueR DDR3 SO-DIMM 1066MHz 4GB CL7, 1.5V, 512Mx64, 204pin (PC8500)

          I hope it helps

    • I’m sorry to hear about the issues. It sounds like you may have bought 1333MHz RAM instead of the proper 1066MHz RAM. If that is the case you’ll want to exchange them for the proper 1066MHz RAM.

      If you do have 1066MHz modules, I recommend trying to clean the memory module. Take a clean pencil eraser and gently rub it along the metal contacts on the memory and follow that by using a microfiber towel along with rubbing alcohol to clean the metal contacts on the memory, this should insure that the memory is getting a solid contact with the computer

      If that doesn’t resolve the issue, I would try both and SMC and PRAM reset.

      SMC reset: http://support.apple.com/kb/HT1411

      And

      PRAM Reset:
      1) Start the machine while holding down the Option-Apple-P-R keys

      2) Wait until you hear the 3rd startup chime, then let go of the keys and let the machine boot up.

      Lastly if the issue is still unresolved, I recommend running an application called Rember. Rember is a free download at http://kelleycomputing.net:16080/rember/. Once you have it downloaded please run a 3 pass test. This application will let us know if any issues are present on the memory modules.

  • Hi, I’m pretty green on all this stuff. I have the Macbook Pro 5,1 and meet all compatibility (already had Model Name: MacBook Pro
    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.33f8)

    ** I’m still running Snow Leopard and having trouble with Flash these days and can’t seem to update it and I get Safari notifications stating my version is no longer supported. Found this discussion when trying to sort out upgrading to Mavericks? or Yosemite? Then I wonder how to do this 8GB memory upgrade…and HOW. THANK YOU for any advice!

    • PS – when I ask how, I mean really basic how because as you can tell, I’ve never done any manual upgrading – only the system-automated. Thanks again!

    • Hello Elana,

      We have step by step instructions on how to install Yosemite here.

      We have an installation video for the RAM upgrade here.

      I would recommend getting the 8GB upgrade kit before upgrading to Yosemite.

  • Hi, could you please let me know if my macbook pro would be compatible for an 8G ram upgrade?

    Model Name: MacBook Pro
    Model Identifier: MacBookPro5,5
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.26 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP55.00AC.B03
    SMC Version (system): 1.47f2

  • After determining that mine is a Macbook5,1; Itried installing recommended firware

    – a message popped up saying ” this computer does not need this update” (my macbook which currently running Yosemite 10.10.1.)

    – 2 yrs back I changed from original setting of 2gb to 3g ddr3 ram. and its dead slow.

    – Also i noticed mac heated up really quick when i upgraded to 4gb ddr3 ram.

    kindly advise if my machine is ok to go for 8gb update.

    • Yes, my Late-2008 Unibody MacBook has 8gb of ram, just install it and find a patch that suits your firmware. Another nice unofficial tweak is to get an Optibay kit, throw out the Superdrive, install the original HDD there, and install an SSD in the hard drive slot. Then configure this as a Fusion Drive. Machine feels like a new one :)

      • Thanks Michael,

        Hows the performance with 8gb ram ?? is it faster? does the battery heats up??

        strangely with 4gb ram upgrade on my mac … online video streaming kept pausing like an old VCR playback :(

        so now you have HDD+SSD?? how many gb’s are they put together?

        • The Fusion Drive is 256gb SSD + 640gb HDD. Could have gone with 128gb SSD but I wanted to make sure if the FD experiment didn’t go well, I still had a decently-sized SSD to use standalone. Performance is around 220mb/s write and 270mb/s read. Strangely enough this is almost the same as my late-2012 Mac Mini, so that old MacBook is still pretty fast! As for the ram, having no swapfile, even when working with AutoDesk Fusion 360 is awesome, and keeps this MacBook still usable for some 3d-designing. Even sold my iPad because I love this laptop so much that I rarely used the pad :)

  • Hi I want to know if my model is compatible with this solution

    Nombre del modelo: MacBook

    Identificador del modelo: MacBook5,1

    Nombre del procesador: Intel Core 2 Duo

    Velocidad del procesador: 2.4 GHz

    Cantidad de procesadores: 1

    Cantidad total de núcleos: 2

    Caché de nivel 2: 3 MB

    Memoria: 4 GB

    Velocidad del bus: 1.07 GHz

    Versión de la ROM de arranque: MB51.007D.B03

    Versión SMC (sistema): 1.40f2

    Número de serie (sistema): W89141098QT

    UUID de hardware: CB18F2D2-96A0-537C-946D-92998AE0E159

    Thanks

  • It looks like my 2008 Macbook 5,1 is compatible so I just bought the memory from the site you recommended :) I will let you know how it goes. And here I was considering getting a whole new computer! I’m pretty excited. Hopefully I can get another 6 years out of this baby :D

  • Hi!
    Anyone knows if I can upgrade my late 08 MBP 2.8 from 4 to 8Gb DDR3 1066 MHz if I am already running Yosemite? My Boot ROM Version is – MBP51.007E.B06

    Thank for all the info

    • Model Name: MacBook Pro
      Model Identifier: MacBookPro5,1
      Processor Name: Intel Core 2 Duo
      Processor Speed: 2,8 GHz
      Number of Processors: 1
      Total Number of Cores: 2
      L2 Cache: 6 MB
      Memory: 4 GB
      Bus Speed: 1,07 GHz
      Boot ROM Version: MBP51.007E.B06
      SMC Version (system): 1.33f8
      Serial Number (system): W89031EF1GN
      Hardware UUID: D647F1D2-0B6F-5C2D-80E4-75021AA

  • MacBookPro5,1 late 2008
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 6 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06

    will recognize then lock up when 8gb ram installed. It will accept 1 4gb module and one 2gb module without a problem.
    I replaced ram several times still the same thing happens. I ran rember to check ram.
    I am running snow leopard.
    Is there another bios update that would correct this problem?

    • Hello Richard, sorry to hear about the issues. You’ll want to confirm your SMC revision is 1.33f8 (http://support.apple.com/kb/DL741).

      I would than recommend trying to clean the memory module. Take a clean pencil eraser and gently rub it along the metal contacts on the memory and follow that by using a microfiber towel along with rubbing alcohol to clean the metal contacts on the memory, this should insure that the memory is getting a solid contact with the computer

      If that doesn’t resolve the issue, I would try both and SMC and PRAM reset.

      SMC reset: http://support.apple.com/kb/HT1411

      And

      PRAM Reset:
      1) Start the machine while holding down the Option-Apple-P-R keys

      2) Wait until you hear the 3rd startup chime, then let go of the keys and let the machine boot up.

      If you continue to have issues please contact us so we can get your OWC RAM replaced for you.

  • Can my Macbook handle 8GB memory?

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8
    Serial Number (system): W88510ML1B0
    Hardware UUID: 87304618-C5B8-53CA-8343-A762E02FBA3D
    Sudden Motion Sensor:
    State: Enabled

    • Hi, your MacBook appears to match the flow chart criteria at the bottom of the article. As long as you are running OS X 10.6.6 or later, you’re MacBook will be compatible with 8GB of memory.

  • Hi- I’ve got a Macbook Pro (see below) running Yosemite. Will it handle the 8 gig upgrade?

    Model Name: MacBook Pro
    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.66 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 6 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.41f2
    Serial Number (system): W88433EV1GA
    Hardware UUID: 357EC52A-E2B9-595B-BB39-03CCBF04C9FB
    Sudden Motion Sensor:
    State: Enabled

  • I have a macbook 5,1 with Boot ROM Version: MB51.007D.B03. It came with 4GB in DIMM1. I bought the 2x4GB memory kit from OWC. Got it today. Tried both together and got the 3 beeps when turning it on. Separately they work just fine!
    That’s a little bit of a bummer. I had done quite a bit of reading on the web and thought that going with OWC was the sure-way of getting the memory to work on the first go! Any suggestions would be welcome. Again the memory is brand new and works separately; it is clean; all shiny compared to the existing one.
    Thanks in advance for your help!

    • I have OSX 10.9.5. I ran the various tests recommended below: EFI update -> my Mac tells me it’s not needed. SMC and PRAM don’t make a difference. In the worst case scenario, if I can add 2 more gig, that’ll still be better than 4!
      Still interested in any suggestions to get 8 working…

      • I’m sorry to hear that the upgrade isn’t going as expected. The three beeps indicates bad RAM, however they are working individually so the modules themselves aren’t bad. I would recommend testing to see if the modules work in reverse positions if you haven’t already, and to test them separate from each other and paired with the Apple memory as well. From there it would be best to contact our tech support team for further support and resolve this. We can be reached via phone at 800-869-9152, or 815-338-8685 internationally; by chat; or by e-mail.

        • Thanks Alex for getting back with me. I’ve tried all of that with the same result. Interestingly enough, the “original” memory is a Corsair 4GB at 1333MHz. My Macbook is a refurbished from BestBuy.
          I will call the number you gave me above.

  • I have a Late 2008 Macbook Pro 2.4 GHz Intel Core 2 Duo, 2 GB 1067 Mhz DDR3 memory, version: 10.7.5, Boot ROM version: MBP51.007E.B06
    I tried to put in two 4GB DDR3 but it only “beeped” and would not start…
    Could it be that new memory is not compatible?
    Please help!
    Thanks!

    • I’m sorry to hear about the issues. If the computer was giving a series of single beeps it means it thinks no memory is installed, indicating an installation issue. If the computer was giving a series of 3 beeps that indicates bad RAM – http://support.apple.com/kb/ht1547.

      I recommend trying to clean the memory module. Take a clean pencil eraser and gently rub it along the metal contacts on the memory and follow that by using a microfiber towel along with rubbing alcohol to clean the metal contacts on the memory, this should insure that the memory is getting a solid contact with the computer

  • I have a Late 2008 MacBook 5,1. My Boot ROM version is MB51.007D.B03. I did the firmware update when it first came out back in 2009. I have two 1067 MHz 4 GB DIMMs installed, but the computer only recognizes them as 2 GB DIMMs. My wife has the identical computer with the same firmware and RAM, but hers utilizes both sticks for a full 8 GB. Any suggestions?

    • This is an odd issue if the RAM shows as 8GB on your wife’s computer. I would try both a SMC and a PRAM reset.

      SMC reset: http://support.apple.com/kb/HT1411

      And

      PRAM Reset:
      1) Start the machine while holding down the Option-Command-P-R keys

      2) Wait until you hear the 3rd startup chime, then let go of the keys and let the machine boot up.

      If the issue persists try cleaning the RAM slots on the computer with some compressed air.

  • Hi, just want to know
    My macbook have spec
    13-inch, aluminium, late 2008
    Proc 2,4ghz core 2 duo
    Memory 8gb 1333 mhz ddr3 –> ???

    Why my mac still working quite well?
    Or should i change to 1067 mhz ddr3 for the best result?

    Thanks

    • We only recommend using 1066Mhz DDR3 memory with the late 2008 MacBooks. 1333Mhz RAM technically should down clock to 1066Mhz without any issues, however that is not always the case.

  • Just wanted to be sure I could upgrade to 8GB…

    13-inch, Aluminum, Late 2008
    Processor 2 GHz Intel Core 2 Duo
    Memory 2 GB 1067 MHz DDR3
    Software OS X 10.9.4 (13E28)
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

    Thanks

  • Hi, can this article be updated to include MacBook 5,2 ?
    my 2.16GHz has boot rom version MB52.0088.B06 and is currently using 4GB DDR2 @ 800MHz… i’d like to upgrade it to 8GB if possible.

  • Hi, I have a MacbookPro 5,5 (Mid-2009, 2,53GHz Intel Core 2 Duo) with Boot ROM Version: MBP55.00AC.B03, will it access/use 8GB of RAM ?? Im ruuning OS X 10.8.5 (12F45). Thanks in advance

  • Hi, I’m planning to upgrade my Macbook’s RAM to 8gb. I have a late 2008 model with the following specs which I believe is sufficient for the 8gb upgrade:

    Model Identifier: MacBook5,1
    Boot ROM Version: MB51.007D.B03

    However, I’m kind of having a hard time finding a 4gb 1066mhz SODIMM module, would it be possible to use a 1333mhz instead?

  • I purchased 4GB×2 (PC8500 DDR3 1066MHz) for my MacBook 13-inch Late 2008 (MacBook5.1) with the Boot ROM version of MB51.007D.B03. It’s running Mac OS X 10.6.8.
    I’ve been trying to follow this article evrything matches up as close as I can.
    But I encountered a difficulty.

    1. When I put the two 4GB ram into the slots and start it up the MacBook makes 3 beeps and does not start.
    2. I tried one 4GB ram into the upper (lower) slot — the result is same as 1.
    Tried for the other 4GB ram — the result is same as 1.
    3. I tried with one 4GB ram and one of my original 2GB ram and it started fine showing 6GB of ram with any combination of new and old.
    4. I tested 3. with both new 4GB ram but it begins to beep again.

    4 4 – 4 2 2 2 – [GB] — upr slot
    4 – 4 2 4 2 – 2 [GB] — lwrr slot
    – – – 6 6 4 2 2 [GB] — total of ram

    Any ideas?
    Thank you.

    • I am sorry to hear about the issues. 3 beeps is the computer POST (Power on Self-Test) saying it thinks the RAM is faulty.

      I recommend trying to clean the memory module. Take a clean pencil eraser and gently rub it along the metal contacts on the memory and follow that by using a microfiber towel along with rubbing alcohol to clean the metal contacts on the memory, this should insure that the memory is getting a solid contact with the computer

      If that doesn’t resolve the issue the RAM is likely faulty and needs replaced under warranty.

  • Hello, I am unsure if i should upgrade my Macbook pro 15 inch late 2008 model.

    MacBook Pro 5,1
    2.4 GHz
    2GB 1067 MHz DDR3
    Boot ROM Version: MBP51.007E.B06
    OS x 10.8.5

    I double checked the Boot ROM Version by trying to do the EFI update and it states my laptop does not need the update.

    • Hi Aurelio. As we’ve outlined in this post, upgrading your MacBook’s memory is one of the easiest and most cost effective ways to speed up your MacBook. And it looks like you’re machine is certified for 8GB of memory.

  • Hi there!

    I have a 2009 MacBook With model identifier 5,1. However according to an article, which seems to reference you, I need a Firewire port and a SD slot and NOT a thunderbolt. Now funnily enough, I have none of them. Can I still upgrade from 4GB to 8?

    • Hi, as long as your MacBook5,1 meets the criteria in the above post, you will be able to install 8GB of memory. The flow chart at the bottom of the post should clear up any confusion. Thanks!

  • Hey there….I have a late 08 aluminum 4GB (i think its 2×2GB)macbook 2.4 model A1278 (and I think its DDR2).Im not computer savvy at all but both memory slots are taken. Im alittle unsure if it has 4 or 8 Gb of ram currently because the order paper work I have just says 4GB MACBOOK and im not sure if it meant with one or two modules.
    Ok …so… It started beeping 3 at a time… so I went apple and they confirmed that my ram went bad.
    Id like to upgrade to the 8GB if possible…but I dont know what the boot rom is because I cant get it to start up. Thus…I cant download the EFI UPDATE….SO …i was wondering if I needed to get the proper 2×2GB first in order to do the upgrade if possible. And when I do upgrade the ram….what exact module should I be lookin for…..my current modules have a label with “2GB 2R×8 PC3-8500S-7-10-F1″….and I have no idea what that means really……im thinking I should be looking to get 2×4GB PC3 8500 (OR HIGHER?) DDR2 …..is that right? Can I get a DDR3?
    Sorry about all the uncertainties…..as you can see im more than slightly confused…..lol! Im new to this ram stuff….

    • It is best for you to contact our Sales team with your computer’s serial number to be 100% certain of which model computer you have.

      It does sound like you have a MacBook5,1 which is compatible with 8GB of RAM if the latest firmware is installed (as detailed in this blog). If you stayed on top of installing your system updates then the update would have been installed automatically.

      A MacBook5,1 uses DDR3 1066Mhz memory and all compatible upgrades can be found here

  • After reading this article I purchased and 8GB upgrade kit for my Macbook 13″ late 2008 unibody, or MacBook5,1 as its put above.

    I’ve been trying to follow the article as close as I can, everything matches up. It is a 2.4ghz model and had 4GB of memory installed when I bought it. It’s running OSX 10.9.4.

    When I put the two new 4GB ram into the slots and start it up the macbook makes 3 beeps and does not start.

    I tried with one 4GB ram and one of my original 2GB ram and it started fine showing 6GB of ram. I tested this with both new sticks but when I put both of them in it begins to beep again.

    Am I doing something wrong? I’m kind of new at RAM upgrades. Thanks for the help!

    • I’m sorry to hear this isn’t working smoothly. The first thing to do would be to try the EFI update to to make sure you have the new version, not the older version with the same name.

      Second is to test each of the 4GB modules with a 2GB. If one doesn’t work, try cleaning the contacts by using a clean, soft pencil eraser to rub gently along the contacts on both sides of the modules. You can also use a Q-tip and rubbing alcohol instead, but you need to let it dry afterward.

      Third is to install the 8GB kit and reset the SMC and PRAM together in that order.

      If all else fails, please contact our tech support team via phone at 800-869-9152, or 815-338-8685 internationally; by chat; or by e-mail.

  • I have a macbook 2008 late. My macbook is Macbook 5.1. And a Boot ROM version is MB51.007D.B03.
    Can I upgrade memory to 8 GB with 2 x 4GB DDR3-1333 PC3 10600, not 4GB DDR3-1066 PC3-8500? Thank you.

    • We recommend using memory of the speed the Mac is designed to take. As long as you are using the correct generation of memory (DDR3, DDR2, DDR) for your machine. You can technically use different speed memory, but it adds unnecessary variables and potential compatibility problems while not really giving you any benefit. The one notable exception is the 2011 MacBook Pros.

  • Hi all,

    Just want to thank the following (OWC Grant) for the creation of this article, it has helped greatly with the 13″ MacBook (late 2008 model) that I inherited.

    I have a few questions on the following if you can please address for me.

    1. MacBook is currently on OSX Version 10.8.5 (Mountain Lion). Put a copy of the OSX on an 8gb thumbdrive for copy.

    I have purchased the following for the laptop off Newegg:
    a. PNY XLRB PRO 240GB Internal Solid State Drive (SSD) http://www.newegg.com/Product/Product.aspx?Item=N82E16820178453
    b. G.SKILL 8GB (2 x 4GB) DDR4 Laptop Memory
    http://www.newegg.com/Product/Product.aspx?Item=N82E16820231294

    After reading the article, it looks like I will be fine with the 8GB. Just want some input from you guys on the hardware I purchased is adequate for this MacBook. Basically going to be used for Outlook and Gmail email, Microsoft Project and Office, etc.

    2. Should I upgrade to Mavericks on the following? I’ve done some research on this with the 2008 model and have seen mixed results.

    Thank you for the help, it is greatly appreciated!

    • We are glad to hear this article helped you! We cannot really comment on non-OWC products in terms of quality, but as for the performance for Outlook, email, Office, etc. 8GB of memory will do very well. The one thing you want to be wary of is the SSD. Late 2008 MacBooks, and many of the late 2008-2010 Mac machines, have trouble with 6G drives of any kind, both SSD and hard disk based. In these machines, those will only perform at SATA Revision 1.0 (1.5Gb/s, 150MB/s) speeds rather that the SATA Revision 2.0 (3.0Gb/s 300MB/s) speed the computer can deliver. The compatibility information on our 6G SSDs has further details. Because of this we recommend use of 3G SSDs in these systems.

      As for Mavericks, that is really up to personal preference and the applications you are using. Some newer software requires the latest OS, but otherwise it really depends on if the new features sound appealing and useful to what you are doing.

  • I have a macbook 2008 late. My Macbook is MacBook5,1. And a Boot ROM version is MB51.007D.B03.
    Can I upgrade to 8gb ram with DDR3-1333 PC3 10600? Thank you so much.

  • Guys, thanks & great job on this article. It’s still relevant three years later. Sorry if this has been beat to death already, but your update comment at the end of the article:

    “UPDATE: FEBRUARY 2012
    EFI Firmware Update 2.8 was released on February 28, 2012 for the MacBook Pro, to resolve graphics issues. It does not disable the 8GB compatibility the previous firmware revision granted.”

    … sort of makes it sound like (i.e. “does not disable”) it is dependent on the upgrade having already been in place. Can you confirm that the code to support 8GB is included in MBP51.007E.B06?

    Background info, I installed this upgrade a while back and I just noticed that I’m failing memory tests in the last couple of GB. Probably a bad chip and a coincidence, but I thought I’d verify.

  • Does anybody know if this firmware update also allows the “Early 2009” Macbook (MacBook5,2 MB52.0088.B05) to support 8gb without any slowdown?

  • Hi

    I have my boot rom at MB51.007D.B03 and even tried to reinstall the firmware but it won’t let me. I can use 6gigs no problem and have checked with 8 but I get crashes and eventually the machine stops booting. I’m just borrowing someone’s ram to test the suggestions above. Any idea what I can do to manually install the update like you suggested you did above so I can get some ram myself and upgrade?

    Thanks
    Cian

    • I’m sorry to hear about the trouble with that. You can find the EFI update here. It should work and help with this. If it still doesn’t work try also updating the SMC, which can be found here.

      If the EFI update from that download tells you it isn’t needed, it would be best to contact Apple for further instructions on making sure your computer has the “newer” EFI update of that version.

      If everything is properly up to date and it still doesn’t work, check the RAM you are using and make sure it is compatible. You may also want to clean the contacts just to be safe. To do that please use a clean, soft pencil eraser and rub gently along the contacts on both sides of the modules. You can also use a Q-tip and rubbing alcohol in place of the eraser, but you need to let it dry afterward.

      If that still gives you trouble, please contact our tech support team via phone at 800-869-9152, or 815-338-8685 internationally; by chat; or by e-mail.

  • Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.53 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 6 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06

    Looks like I can upgrade to the 8gb of RAM. DDR3, 1066Mhz right? Any issues with using a SSD with the increased RAM?

  • Before I buy the 8gb for my macbook to make more room for photography work, will this one accept more memory?
    Model Name: MacBook
    Model Identifier: MacBook4,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 800 MHz
    Boot ROM Version: MB41.00C1.B00
    SMC Version (system): 1.31f1
    Serial Number (system): W8824NDB0P1
    Hardware UUID: E649336D-17A1-5D0D-AD9F-C70D501270EA
    Sudden Motion Sensor:
    State: Enabled

      • Aha!
        Ok Thanks. One more question, my Macbook Aluminium 2008 has a broken keyboard and id like to replace it. Could I just get a Macbook Pro late 08 keyboard to replace mine with? Or does it HAVE to be specifically for my Macbook?
        Thanks :)

        • The MacBook Pro Late 2008 models came in 15-inch and 17-inch varieties only. The first 13-inch MacBook Pro was the Mid 2009 model, and that keyboard could be used in the Aluminum 2008 MacBook model.

          However, depending on which Model MacBook you have the keyboard markings were slightly different. The 2.4GHz model had an illuminated keyboard (just like the Pro 2009 model) but the 2.0GHz did not (and thus the 2.0GHz model wouldn’t have the accompanying brighten and dim backlight function keys. You could install it into the 2.0 model, but the backlight functionality wouldn’t work.

  • I just tried running the 1.8 firmware update and received a message that I do not need it. I just ordered the 8GB RAM to upgrade and was going to update the firmware before it got here. Do I have to wait to update firmware?

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03

    • You do not need to wait to run the update. The update was most likely run automatically in the background, so your computer will be ready to go with the 8GB of memory when it arrives. The boot ROM version you have is different than what is in the blog, but it is possible it is a newer version than what is necessary. If you do have any trouble with the memory when you receive it, please contact us at 800-275-4576, by email, or by chat.

  • Thanks for such a great/informative article. After updating my MacBook5,1 (4GB RAM) to Mavericks, I have been experiencing sluggish performances quite now and then. So, I was wondering if I can upgrade the RAM to 8GB, which I will certainly do now after reading this article.

  • hi! i would like to know if the 2008 late mac will take full advantage of the 8gb of ram.. isn’t the main board limited to 4gb or something? im a noob ok, my question is, will it be good deal for the money or i will be ok with 6gb ram;

    THANKS

  • Model Identifier: MacBook5,1
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.40f2
    Software OS X 10.9 (13A603)

    I tried installing 8GB of Corsair CMSO8GX3M2A1333C9. It didn’t work. I ordered a replacement thinking it was faulty memory. Still didn’t work. Two different sets of errors though. The first couple resulted in long beeps. The second pair just kept spinning the optical drive without any beeps.

    I tried also resetting the SMC and PRAM. No luck.

    Any advice?

  • Hi,

    My specs have Boot ROM Version: MBP51.007E.B06 (not B.03) and I am running Maverick, is this going to make a difference in relation to the certification for 8GB RAM?

    Thanks

    • Your computer has the latest firmware from Apple which came out on Feb 28, 2012. Your computer will be still able to handle 8GB of memory without issue.

  • Hi i was wondering if I can run 8GB on my late 2008 MBP. Using Mavericks now. Thank you for help and advice.

    Model Name: MacBook Pro
    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.33f8
    Sudden Motion Sensor:
    State: Enabled

  • Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

    Operative System Version: 10.9.1

    The upgrade to 8bg RAM doesn’t work.

    Any ideas?

    Thank you.

    • You have the proper firmware to run 8GB (2x4GB) of memory. I recommend trying to clean the memory module. Take a clean pencil eraser and gently rub it along the metal contacts on the memory and follow that by using a microfiber towel along with rubbing alcohol to clean the metal contacts on the memory, this should insure that the memory is getting a solid contact with the computer

      If that doesn’t resolve the issue, I would try both and SMC and PRAM reset.

      SMC reset: http://support.apple.com/kb/HT1411

      And

      PRAM Reset:
      1) Start the machine while holding down the Option-Apple-P-R keys

      2) Wait until you hear the 3rd startup chime, then let go of the keys and let the machine boot up.

      If you continue to experience issues please contact our tech support

      • Thank you very much but I still have a doubt.

        Do you mean trying an SMC and PRAM reset before installing the new memory or once it’s installed.

        Thank you.

  • Will it bugger my MacBook (late 2008) if I use the faster RAM, 1333 vs 1066, and is there any real value to the faster RAM if the bus speed bottlenecks things at 1066? I am running OS-X 10.9.1.

    Cheers,

    Elvis Vincent
    IMOM

    • We only offer and support 1066Mhz memory for the Late ’08 MacBooks. There is no benefit to running 1333Mhz memory even though it is theoretically possible to use it.

  • Sorry if already Asked & Answered, but is faster RAM supported, such as PC3-12800 SODIMMs? I’ve generally not had an issue using faster RAM in desktops since the Bus will make them operate at slower speed ratings anyway. And if in this case those matched sticks won’t work, what is the fastest RAM that will function properly?

    • We only offer and support 1066Mhz memory for the Late ’08 MacBooks. All speeds of DDR3 are suppose to be backwards compatible with each other, so theoretically 1333Mhz memory would down clock to the proper 1066Mhz speed. Doing this would be of no benefit to the performance of the computer and only leaves the door open for issues to be created.

      • I tried replacing RAM in this machine using some 1333MHz DDR3 (Corsair) and it failed… but that RAM also failed in a MacBookPro6,2 as well as MacBookPRo5,1. Your mileage may vary. It definitely worked with Samsung 1066MHz PC8500S DDR3

        • MacBook5,1 (Aluminum Unibody Late 2008) is especially very specific about what kind of RAM module is placed in the first RAM slot – it must always be exactly the same as is in the specs by Apple. In the other slot can be almost anything including 1333MHz RAM modules.

  • Awesome post!

    Running Mavericks on a late 2008 Macbook 5,1 2Ghz

    Boot ROM is MB51.007D.B00.

    Does it need to be upgraded in order to use 8GB RAM? In the article you say it should be MBP51.007E.B05, but the current version on the applie site is listed as MB51.007D.003.

    Help!

    • It is the difference between MacBook & MacBook Pro that is causing the confusion here:
      MBP51.007E.B05 is the correct version for For MacBook Pro models (MacBookPro5,1).
      MacBooks with a Model ID of MacBook5,1 should have a Boot ROM version of MB51.007D.B03 as listed on Apple’s site.

    • Hey Nick,

      How is Maverick running on your ancient Macbook? I have the same awesome model and looking to see if I should upgrade to maverick or stay with snow leopard. Also did you ever add that 8gb of ram and if so how is that working for ya? Also looking to upgrade in this department too. Thanks for your help much appreciated.

  • hi
    can this mac run with 8gb ram
    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.40f2
    Serial Number (system): W8911GYV7WU
    Hardware UUID: 90A24162-9082-549C-A35E-7135586796F4
    Sudden Motion Sensor:
    State: Enabled

  • Thanks for making this clear. I’m a tech power user, but we get into ROM versions and you start to lose me. The flow chart at the end was exactly what I needed. I saw that I have MacBook4,1 and that settled it: 4GB is the max for me. Good work guys! I guess I’ll be getting a whole new system. Shucks! My disappointment is indescribable!

  • Hi,
    these are my features of my macbook running 10.9.

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

    can upgrade to 8GB?

      • Hello and thank you for your answer,

        by your message i undestand that i don’t need any extra firmware update to make the 8GB right?

        Thanks!

          • Jarrod,

            I have exactly the same late 2008 Macbook as “Markov” and it has the updated firmware (Boot ROM Version: MB51.007D.B03). He asked if he could upgrade to 8GB Ram and you said YES on 12/17/13 — no need to upgrade the firmware. That is very encouraging.

            I currently have 6GB ram in my laptop and would like to boost it to 8GB. My question is, can I replace the current 2GB chip with a 4GB chip that was used in my mid-2012 Macbook Pro. I bought this 4GB chip from OWC quite some time ago and have recently upgraded to 16GB. So, I have two 4GB chips available. Both are DDR3 SDRAM chips.

    • Hi there,

      my wife’s Unibody Macbook 5,1 is running following setup:

      Boot-ROM-Version: MB51.007D.B03
      SMC-Version (System): 1.32f8

      Software OS X 10.9.1 (13B42)

      It really just has 2 Gigs of RAM, I just tested the 4 Gigs out of my Windows Laptop.

      So system wise I should be good to go. Is there anyway of determening if I habe the “too early” or the late EFI version?

      I will order RAM soon, just would like to know if I will habe to fiddle with the system more than that.

      Thanx to all.

      Chewie

  • Hi,

    I decided to upgrade the 2x 2GB memory. 10.9 Maverick seems to be really slowing down my MacBook… I purchased 8GB DDR3-1600 and got to work. Installing the sticks was easy, but after piecing everything back together and booting up, I got 3 beeps pretty much instantly. Switched the 2 4GB sticks around, no success. Running 1 stick at a time would not work either.

    I’ve tried several combinations and I found that the 4GB would not work in BANK 0/DIMM1, only in BANK 0/DIMM0. So I have now set up the original 2GB in BANK 0/DIMM1, and the 4GB in BANK 0/DIMM0. Resulting in 6GB.

    Any thoughts on what might be the problem? If I switch back to 2x 2GB there are no issues with either of the banks.

    Macbook5,1 (2008 Late)
    Intel Core 2 Duo
    2 GHz
    6GB RAM (1x 2GB original Hynix & 1x 4GB DDR3-1600)
    Boot ROM MB51.007D.B03
    Running OSX 10.9

  • I’m having the same issue as Eathan Bell:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

    When I attempt to install, I get “Your computer does not need this update”.

    Has anyone tried this on 10.9 without having done the EFI update? Success?

  • @Eathan Bell, maybe you didn’t read this entire article, but you need to update your boot rom. Its 4 versions to old. Here is the latest version http://support.apple.com/kb/DL1502

    Then I would do a clean install to Mac OS 10.9 Mavericks when it comes out later today.

    And finally after a fresh install do a restore from a Time Machine backup.

  • Having an older OS then Snow Leopard will not affect the ability to install 8GB of memory. It sounds like you have some defective memory. I would recommend running Apple Hardware Test or Rember to see if the 8gb of memory tests defective.

    • Thanks for the suggestion. I went into Single User mode, did a memtest with both sticks in, and got some “Data Mismatch” errors. After consulting Googe, someone on another forum mentioned to do a memtest with each stick at a time. I did just that, and found out that only the one stick had the errors. For now I am using the working 4GB stick and an older 2GB stick, and it works just fine. I know it’s recommended that you upgrade both sticks at a time, but for now this will do. Thanks for the help. :D

      Btw, is that other stick just unusable, or is there anyway to recover it?

  • Quick question, am I able to still do this if I have a newer OS clean installed? Meaning Snow Leopard was not on the hard drive before install. Mountain Lion in my case.

    My specs:

    Macbook5,1
    Intel Core 2 Duo
    2 GHz
    4GB RAM
    Boot ROM MB51.007D.B03

    I bought some Mushkin Apple memory, 8GB(4GBx2) of course as the article is regarding. Installing it worked fine, no three beeping as others have had… but after a while I noticed slow downs and some even odder things, like files seemingly disappearing and programs not opening because of missing files. This was about a week after using it. I put back in the 4GB RAM and everything is fine now. Is this because I didn’t have something installed that Snow Leopard would have had, and Mountain Lion doesn’t have now? Or is it just because I maybe need to wipe my hard drive, install a fresh OS, and go from there? Should I try to just run 6GB of RAM?

    Also, resetting the PRAM did nothing.

    Thanks in advance for any advice.

  • A couple of weeks ago I replaced 2x2GB Mushkin DIMMs with a 2x4GB kit from OWC. Since then my MacBook Pro [5,1 running 10.6.8] has experienced random freezing. Seemed like the first day or so was fine, and then it freezes randomly….anywhere from once to several times a day.
    Seems like other people have had success with the 8GB configuration. I’m going to swap the new RAM for the old and see if the freezing goes away; however, all tests on the new memory appears fine, so I’m not entirely convinced it’s the RAM.

    I have run Apple Hardware Tests, MemTest86, TechTool Pro memory tests; within the OS I ran Rember, which tested 6.8GB with no issues. ALL tests on the new 8GB have good results.

    Perhaps the freezing is coincidental to the new DIMM installation, and maybe coming from somewhere else?
    Disk Utility shows no issues, and SMART status is ‘verified.’
    I put my Seagate Momentus XT 750GB (ST750LX003, 2nd gen hybrid HDD, SM12 firmware) in a PC and ran Spinrite. Besides a few instances of overheating, it did not identify any issues. Although, there were lots of seek/ecc errors, but I’ve seen that on many Seagate drives.
    I will be upgrading to an SSD this week anyway.

    I’ve seen some forum posts recommend enabling a 64-bit kernel to fully support the 8GB….. I can give it a shot. Anyone have thoughts/experiences for the 64-bit kernel?

    I’ve also reset the PRAM and SMC a couple of times.
    Some people say the 2.4GHz MBP 5,1 is stable with only 6GB instead of 8. Yet, others report being happy with the full 8GB.

    I’m still trying to figure this out, but as I said, .. the new OWC memory does test fine with all the memory testers I have used so far. Anecdotally, the system freezes began around the same time as the 8GB upgrade. Perhaps it will get cleared up with the SSD. [The hybrid Seagate has served me well for 2 years, and did offer a nice speed boost.]

    Model Name: MacBook Pro
    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 8 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.41f2
    Sudden Motion Sensor:
    State: Enabled

  • Hi,
    when I put 2 modules of 4gb of ram in my macbook, doesn’t startup and make 3 beeps. If only put 1 module of 4gb and another one of 2 runs fine ¿Wich cual be the cause? This is my computer:

    Información del hardware:

    Nombre del modelo: MacBook Pro
    Identificador del modelo: MacBookPro5,1
    Nombre del procesador: Intel Core 2 Duo
    Velocidad del procesador: 2,53 GHz
    Cantidad de procesadores: 1
    Cantidad total de núcleos: 2
    Caché de nivel 2: 6 MB
    Memoria: 6 GB
    Velocidad del bus: 1,07 GHz
    Versión de la ROM de arranque: MBP51.007E.B06
    Versión SMC (sistema): 1.33f8
    Número de serie (sistema): W88471H11GN
    UUID de hardware: EF463963-36EC-54B4-9B15-37DF76E46753
    Sensor de movimiento repentino:
    Estado: Activado

    Greetings ans thanks

    • Glad to see I am not the only one having the problem with the 2x4GB of RAM (which I got in my case from OWC). I have OSX 10.9.5.
      Which version of OSX do you have?
      I need to get one 2GB of RAM to see if I can get to 6GB.

  • My MacBook 5,1 meets all the requirements but I run 10.5.8, I understand that I need to be running 10.6.6 at least to take advantage of 8gb on the mac osx but does anyone know if I can use 8gb with Ubuntu 12.04.3? I would upgrade the osx also but I would like to use this laptop mostly for Linux. Thanks.

  • I was also wondering if I could upgrade my Macbook 5,2 (MB52.0088.B06) to 8gb? I know you tested it and you found that it can only take 6gb but there are a few people who say it works. I think it may be a similar situation to the Macbook 5,1. Is there any reason 8gb would work on 5,1 and not 5,2?

  • hello! these are the data from my mac

    Model Name: MacBook Pro
    Model Identifier: MacBookPro 5.1
    Processor Name: Intel Core 2 Duo
    Processor speed 2.4 GHz
    Number of Processors: 1
    Number of cores: 2
    L2 Cache: 3MB
    Memory: 2GB
    Bus Speed: 1.07 GHz:
    Boot ROM Version: MBP51.0007EBO6
    SMC Version (system): 1.41f2
    Number of serious (system): W89158K38Q1
    Status: Active

    works for 8GB RAM? and they’d give me recommendation to improve it?
    that SSD? thank you very much

    • Model Name: MacBook Pro
      Model Identifier: MacBookPro 5.1
      Processor Name: Intel Core 2 Duo
      Processor speed 2.4 GHz
      Number of Processors: 1
      Number of cores: 2
      L2 Cache: 3MB
      Memory: 2GB
      Bus Speed: 1.07 GHz:
      Boot ROM Version: MBP51.0007EBO6
      SMC Version (system): 1.41f2
      Number of serious (system): W89158K38Q1
      Status: Active

      Yes – as long as you’re running OS X 10.6.6 or later you can use 8GB of memory.

  • Model Name: MacBook Pro
    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.8 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 6 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.33f8
    Serial Number (system): W88492481GN
    Hardware UUID: 7C4AA6EC-CFEA-545C-88FA-F2582BEB5391
    Sudden Motion Sensor:
    State: Enabled

    This my machine’s specs: What should I buy to upgrade to 8gb ?? Should I just get 4gb and add it or the two slots I have are used and I need to get an 8GB and take the ones I have in my machine out??

    Do you have any suggestions on what brand that worked best with this particular Macbook Pro late 2008??

    Thanks for clearing up most of the confusion that we have by writing this great article

    Ghassan

  • hello , can i upgrade to 8gb of ram?

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8
    Hardware UUID: FDFC1192-3373-57DD-A73E-E34C9DCFB865
    Sudden Motion Sensor:
    State: Enabled

    thanks

  • Hey there! Great article and thanks for all the info and your effort…
    I have a couple of questions though…

    I already have 4Gb RAM in my late 08 macbook pro… Since I installed Lion, the mbp is a bit ‘laggy’… Thus, although I can extend it to 8Gb Ram based on this info, I’m also considering a SSD.
    According to your opinion, which is gonna improve the performance the most? Which is more appropriate? Ram, SSD, or both?
    Since I wanna buy a battery as well, i’m asking for your opinion so i can order all three (or two) items together…
    Thank you for your time…

    Greetings from Greece

      • I’d also like to chime in here with the reminder that if you do upgrade to both 8GB and an SSD (which made a world of difference with my MBP of this model), make sure you install each upgrade one at a time, making sure that the first is working properly before upgrading the next. In the rare instance that something goes wrong during the installation, this makes it much easier to determine the cause of the problem.

        • Thank you both for the immediate replies. I think i’ll go with the RAM upgrade and then i’ll move on to a SSD. I feel that LION requires more RAM. Although my mbp runs smoothly, it lags a bit compared to the older versions of OS. Taking your replies into consideration, i believe that more RAM is necessary and will make the difference.
          I’ll keep in mind both of your experienced opinions.

          Regards!

  • Hardware Overview:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8
    Serial Number (system): 73909PES1AQ
    Hardware UUID: 4976C865-E1BC-5F59-AFE5-765AD38879AD
    Sudden Motion Sensor:
    State: Enabled

    can i install 8gb of ram???

  • i have

    Modellnamn: MacBook
    Modellidentifierare: MacBook7,1
    Processornamn: Intel Core 2 Duo
    Processorhastighet: 2,4 GHz
    Antal processorer: 1
    Totalt antal kärnor: 2
    L2-cache: 3 MB
    Minne: 5 GB
    Busshastighet: 1,07 GHz
    Boot ROM-version: MB71.0039.B0E
    SMC-version (system): 1.60f6

    It will not run on 2x4gb RAM, 4+1gb RAM is working.

    What do I need to do?

    Best regards
    Peter

    • Try trading out the 4GB module to see if the issue is with the individual 4GB RAM that you currently have outside them computer. It may need to be replaced. Please contact our Technical Support Team at 1(815)338-8685 via live chat or email and they will be more than happy to assist in further troubleshooting if both 4GB modules work or to exchange the failed module.

  • Dear team, thx for this great article and your research beforehand. I have a Macbook Pro Late08 (2x2GB RAM) and I unfortunately broke one of my RAM slots. 1 golden pin is bent – I really don’t know how it happend and I don’t know either what to do right now because I didnt manage it to bend it back – so I only have one RAM slot yet … 2GB is too slow …

    I consider to buy a 4GB or even a 8GB card for my remaining slot. Is this possible or should it always be splitted into 2 slots? Is there an recommendation for a 1x8GB RAM? There are 4 screws on the RAM slot-frame – is the whole deck removeable? I mean, is there a chance to get 2 RAM slots back into my Macbook or should I try harder to bend this golden pin back into its position? Thx so much! Greetings from Vienna, Austria, Europe ;-)

    • Your best bet is to bring that machine to Apple or an Apple Authorized Service Center to have the slot itself repaired or replaced (and depending on what exactly broke, it might be the whole board that gets replaced – so have them quote you a repair cost before they begin any work).

      However, in the meantime, as long as the firmware update has been applied to the machine – you can install a 4GB module in the working slot to get you almost back to where you were (memory-wise at least). You’ll lose out on the dual-channel addressing, but you’ll have the same amount of overall memory. So you shouldn’t see too much of a performance hit from where you started.

      As far as replacing with a single 8GB modules goes, we tried it when 8.0GB PC3-8500 DDR3 1066MHz 204 Pin SO-DIMMs first became available. Unfortunately, it doesn’t work. It is a 4GB per slot maximum.

  • Hi, I have a late 2008 unibody Mac and the correct Bootrom version for MB5,1. However, a few weeks after installing 8GB RAM my computer started freezing and getting kernel panics. This disappeared after I swapped back to the original 2x1GB RAM. Also, with the 2x4GB RAM, when I tried to clean reinstall the OS, it would not proceed beyond a certain point. This issue was also solved with swapping back to original RAM. Do you think the RAM was faulty? Or should I just upgrade to 6GB/4GB instead?

  • Hello, I believe I fit all of the specifications of the upgrade without any changes. Since this is not supposed to happen (yet it is), does it matter how many MHz the two 4gb sticks are? I know the current is 1067, but can it be more? Like 1600 for example?

    Thanks

  • Hi, I have the Unibody MacBook 13″ aluminum (MacBook5,1) and have downloaded the EFI 1.4 update already. However I don’t recall exactly *when* I downloaded the update, whether it was before or after Apple snuck in the “secret” 8 GB update. My BootROM version is MB51.007D.B03. Did the “old” (non 8 GB) version of the update use the same version number, or is MB51.007D.B03 definitely the version that supports 8 GB? Thanks!

      • OK, so they did change the BootRom version number when they released the 8 GB update version. Good to know! Time to go order meself some RAM!

  • I want to upgrade my 5,1 Mac book, 2GHz, 2gb all specs correct (except still on 10.8.5 so will upgrade to Snow Leopard)

    but can I use PC3-10600 DDR3 1333MHz SO-DIMM
    instead of PC3-8500 DDR3 1066MHz SO-DIMM??? Could that make it faster??? Sorry am a layman when it comes to tech stuff

    • This is a commonly asked question. Every so often we will find certain model computers can benefit from faster memory, like the 2011 MacBook Pro. For a MacBook5,1 we have found no benefits of 1333Mhz memory being installed into this model, so we only recommend the 1066Mhz memory.

  • My Macbook is Macbook 5,1 with Boot ROM Version MB51.007D.B03 looking to upgrade my memory to the max. I am also running Mac OS X Lion 10.7.5. After following your directions, I was unable to install the EFI Firmware Update 1.4. Is it because I am running Lion?

  • I bought identical memory from a reputable brand (because I can get it off the shelf and the need was urgent) and it doesn’t work – just giving me 3 long (and sometimes 3 short in-between) beeps.

    I’ve tried all combos, all slot options and no difference is forthcoming

    You guys sound pretty confident that OWC will work, and you’ll guarantee it? I’m in the netherlands, so the shipping is the real challenge.

    Just in case, here are the Mac’s details:

    Model Name: MacBook Pro
    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.66 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 6 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.41f2
    Serial Number (system):
    Hardware UUID:
    Sudden Motion Sensor:
    State: Enabled

    if confirmed, I’ll order soonest – thanks

  • Hello,

    The following are my specifications, I believe I am good to purchase the memory you reference in this article, correct?

    Model Name: MacBook Pro
    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.33f8
    Hardware UUID: A00AFBE8-79FE-5748-9701-AA63E0A67EA4
    Sudden Motion Sensor:
    State: Enabled

    Thanks!

  • I meet all of the requirements.
    13 inch 2.4 Ghz MacBook (Late 2008) running 10.8.2
    MacBook5,1
    MB51.007D.B03

    The most I can get the system to run is 6GB, is this it for my machine or am I missing something?
    When I install both 4GB modules I get a kernel type error on load up screen. DOS like text/ code.
    I can’t imagine how as I have read this and other articles up and down multiple times before I even ordered my Apple 1066 RAM so as to NOT have this problem!!!
    I ran each 4GB module separately to make sure one isn’t bad. They are both good.
    I even reset PRAM.

    Could it possibly be the Apple RAM?

    Please help

    Thanks in advance!

    • It is certainly possible.
      This is something that should be made abundantly clear…you are reading the OWC Blog, which is the Official Blog of Other World Computing. We have been providing quality hardware products and support to the computer industry since 1988 and feature one of the largest online catalogs of computer, iPod, iPhone, and iPad enhancement products through our e-commerce portal http://www.macsales.com.

      When it comes to memory (RAM) all of our testing and qualifications are expressly performed with OWC Brand memory.

      All OWC Brand memory:

      • Meets or exceeds manufacturer specifications.
      • Is rigorously in-house lab tested to ensure superior quality, compatibility and reliability.
      • Is backed by industry leading lifetime advanced replacement warranty.

      Additionally, we qualify our memory through an additional, independent compatibility tests. The OWC ‘MaxRAM’ Certification Program determines the maximum amount of memory that can be installed in a Mac as validated by a series of comprehensive, in-house laboratory tests. While OWC “MaxRAM” configurations exceed Apple’s officially supported maximums, all OWC brand memory upgrades are assured to perform flawlessly and are covered by a Lifetime Advance Replacement Warranty and Money Back Guarantee.

  • Hello, I have a late 2008 MacBook Pro running Mountain Lion 10.8.2 with the following specs:

    Model Identifier: MacBookPro4,1

    Processor Name: Intel Core 2 Duo

    Processor Speed: 2.5 GHz
    
Number of Processors: 1

    Total Number of Cores: 2
    
L2 Cache: 6 MB

    Memory: 4 GB

    Bus Speed: 800 MHz

    Boot ROM Version: MBP41.00C1.B03
    
SMC Version (system): 1.28f3
    
Serial Number (system): YD91351B3R8
    
Hardware UUID: 52491FB1-FAB1-5C53-A8A1-907E19A33FED

    Sudden Motion Sensor:

    State: Enabled

    I have a Western Digital 1TB HDD installed and am needing to run Windows due to some software I need for business that only runs in Windows. Can this MBP be upgraded to 8Gb?

    Many thanks for any help you can offer!

  • Hello Michael. I upgraded my 5,1 to 8GB RAM (running on Mountain Lion and I have all the firmware requirements) with AVANT 4GB DDR3 SODIMM 1066MHZ ROHS around 2 weeks ago. The computer was so much faster….BUT then apps started crashing. My browsers crash 5-6 times a day, my apps crash, my computer shuts down out of the blue…this never happened with the slower RAM. So I removed it and put the old RAM back in. Do you have any suggestions, other than buying your own brand? Does this sound like bad RAM? Thanks! Emily

  • Hi,
    I know this is an “old” post but it doesn’t work for me. I bought the CORSAIR SO-DIMM DDR3 For MAC – PC3-8500 – 2 x 4 Go (8Go) 1066 MHz – CAS 7 – CMSA8GX3M2A1066C7 kit. When I boot the MBP, it beeps three times.
    I don’t understand why though: I’ve checked 10 times the RAM specs.
    Thanks !

  • When guys dropped in the 8GB kit did guys just pick a manufacturer randomly or do you prefer one. I’d like to upgrade but unsure which kit to get. Can you help direct me?

  • Hello, I have a late 2008 MacBook Pro running Mountain Lion 10.8.2 with the following specs:

    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.41f2
    Serial Number (system): W89203818Q1
    Hardware UUID: 57AE2375-63DD-5E1D-BF3F-1C93D6CA7AFB
    Sudden Motion Sensor:
    State: Enabled

    May I safely upgrade to 8 GB’s of RAM? It seems from the article that I should be ok doing so?

    And if all looks good, is this what I want?: http://eshop.macsales.com/item/Other%20World%20Computing/8566DDR3S8GP/

    Thanks in advance for any guidance!

      • Thank you so much for your quick response! You don’t anticipate I’d have any problems whatsoever? I’m nervous as Apple officially only recommends 4 GB’s. By doubling to 8 GB’s I’m not going to risk hurting my machine at all? Sorry if I’m asking you to repeat yourself, I’d just like a little more peace of mind before I move forward.

        I’m looking into more RAM is because my machine is starting to feel sluggish, and a little “sticky” (if that makes sense…), but I’m also thinking about doing an archive and clean re-install, and possibly replacing my internal hard drive. Money is a bit of a factor at the moment, so I’m looking at possibly doing all of this, over time, but I’m curious, in your expert opinion, about the order in which I should try these things. Should I try replacing the hard drive first? Or getting the RAM? Or the archive/re-install? Will doing an archive and re-install be worth the trouble and the time?

        Just some background: I don’t do anything too hardcore with my MBP–but I do a lot of surfing on the web using Firefox, with LOTS of tabs open, sometimes I might have Safari or Chrome open, too, and I have Spotify running in the background, and possibly Tweetbot and another Twitter client—maybe the old Tweetdeck, Mail, Transmit, uTorrent, NetNewswire, and Messages….but I have been trying to keep my open apps to a minimum, because everything has been seeming more and more sluggish. I would probably run more, if it didn’t slow down my machine much. I thought 4 GB’s of RAM would easily be able to handle what I’m doing. Do you think upgrading to 8GB of RAM would be a noticeable difference?

        Any of your general thoughts on all of this would again be much appreciated! Thanks!

        • We’ve been successfully exceeding Apple’s officially supported maximums for quite some time through our OWC MaxRAM Memory Certification program. Plus, all OWC brand memory upgrades are assured to perform flawlessly and are covered by a Lifetime Advance Replacement Warranty and Money Back Guarantee.

          Now, given what you do on a daily basis with your computer, RAM is definitely the first place to start. More memory allows you to run more processes at once and with all those pages on all your browsers, all those social clients, and the other programs you have running at the same time – you’re probably running short on memory quite often.

          • Got it, I will order the RAM soon, thanks! Do people notice a big difference when upgrading from 4GB’s to 8? Also, in general, do you recommend an archive and clean install every once in a while? I’ve had this computer since May ’09 and its gone through several OS X upgrades, so I’m thinking a nice new clean install of Mountain Lion might be good? Some claim it will speed things up, but it’s seems like a bit of an extreme measure to me, and I don’t like taking risks w/out feeling the benefit would be worth it… And I guess I really need the new hard drive eventually as I’m always running out of space. I try to always keep at least 10% of my drive or 20 GB’s free, as that’s what many suggest. I’m also looking into the possibility of using iTunes Match to save space in that department and I use a 64 GB thumb drive, so that’s helping a bit. Sorry for my babbling, I’m sharing a bit much with the hopes it might help others whose machines are slowing down and running out of space as well.

            • Yes, the difference between 4GB and 8GB of memory can be quite drastic as evidenced by our benchmarking results.

              A clean install of your OS and a migration of your user account(s) can help with speeding up a machine that has been neglected for maintenance. It will clean up files that are no longer used, preference files for apps you’ve deleted, miscellaneous cache files, etc. and that can account for some sluggishness.

              However, a good rule of thumb is that a hard drive should not be kept higher than 80% capacity. If you are consistently crossing that threshold, then you will want to move some of the data to an external drive or simply upgrade to a larger capacity internally. If you’ve hit that 10% left mark – then you’re in critical need of more storage. Think of it like a room full of bookshelves – as long as all the books still fit on the shelves themselves, then you can still walk into the room and find everything. Once you start piling books up on the floor, you’re making it more difficult and a bit slower (but not impossible) to find the tome you’re looking for. If all the aisles are now covered with books and you’re crawling over piles and moving books from one cramped space to another cramped space just to read the titles – things are definitely getting slower. You really need to open up the space somehow (before filling it all the way up) in order to become efficient again.

              Upgrading to a larger drive (which sounds like an important next step for you) provides the perfect opportunity to install a fresh copy of the OS onto the new drive and use Migration Assistant to bring all your data over to the new drive.

              • I ordered the memory and so that’s on it’s way and I will see how much that improves my system and will certainly be reviewing and considering this other info you’ve linked to, as well. Thanks again for all your advice and help! Much appreciated!

      • Hello, first of all a compliment for your expertise , but im curious about one thing, i have a MBP 5,1 and have updated the firmware 2.8, but my BootRom does not change it stays as MBP51.007E.B05, have you any ideas of how to solve this dilema, im running 4gb memory, and as from today thanks to your research and site, i yearn for 8 gig…hope i can get this sorted out….thank you in advance for all your support anyhow……regards Peter.

  • Hi! I have a Macbook Pro 15 inch late 2008 Boot Rom MBP51.007E.B06. Can I install a 16GB stick? I know it’s really wierd to have that much memory but I am just curious. Thanks in advance.

  • I just upgraded to 10.8.2. The computer place I used to do this told me I could run 8GB in my 2.5 GHz early 2008 MBP 41.00C1.B03. I didnt believe it, but then he popped it in 1 at a time. The first time it did the 3 beeps, so he did something and reinserted it and then the other, and sure enough it showed 8GB 667 Mhz DDR2 SDRAM. I think I already know the answer, but with my system, will it pose problems like shutdowns and overheating? And even though it showed 8 GB, would it really get the whole 8 with my system? Thanks for your time and patience. I am slowly learning about all this stuff.

    • The MacBook Pro Early 2008 models are OWC certified for up to 6.0GB of OWC memory. Once the 6GB mark has been exceeded in actual memory usage (not just having it installed in the machine – but actually being addressed) the system slows down and/or loses stability. As such we do not support 8GB of memory in those machines.

  • Hi guys, thank you for your profound work!
    I have all the specs listed in your article and my MacBook late 2008 is running with 8GB memory.

    But when I start a program that uses a lot of RAM (FilterForge) my Mac just shuts down. It goes black and I have to restart. Everything I’ve done is lost.
    It did not do that with 4GB.

    i am running Kingston KTA – MB1066K2/8G (9905428-005.A02LF)

    • well, for testing purposes I am running at the same time: Safari, FilterForge, Mail, Cinema4D R11, Poser Pro12, iPhoto, Photoshop CS6, Google Earth, iTunes, InDesign CS6, skype, Word 2011. (all legal – before someone asks)

      It uses 4.97 GB memory out of 8 … and it seems to work. I have MacOS 10.6.8 … I switched the two 4GB with each other and I plugged my machine back to electricity (which I did not the last time).

      So it works and my last question is obsolete. (please excuse my weired english – not my native language)

      • Our OWC ‘MaxRAM’ Certification Program determines the maximum amount of memory that can be installed in a Mac as validated by a series of comprehensive, in-house laboratory tests – which we perform and support only with OWC brand memory upgrades which are designed to meet or exceed all manufacturer specifications.

  • Hi i have the Macbook 5,1 and the right ROM version from the article, but after inserting one or both of my 4gb ddr3 1066cl7 rams my macbook makes the 3 beeps over and over. how can i force the efi firmware, i think i updated with the old one when it came out. every help is appreciated.

    • Three beeps indicates the system can’t find the memory at all. This can be caused by a couple of things:
      1. Incompatible memory. This is the right memory here.
      2. Improperly installed memory. Try one at a time making sure the memory is fully seated. If it isn’t pushed in all the way, it can’t be accessed.
      3. Bad memory. If one of the modules has failed, it will need to be replaced. Luckily all of our OWC Brand memory comes with a Lifetime Advanced Replacement Warranty for just this reason. Checking the modules one at a time will also let you know if you have a bad one.
      4. While rare, it could mean the memory slot itself has gone bad. Try installing the original memory again and if it doesn’t boot the machine either, you may need to go to Apple to have the memory bay repaired.

  • I’ve installed the 8 GB RAM (2 x 4GB) that I just received from OWC (fast, BTW!) but it is only recognizing 4 GB. I went back in and reinstalled the RAM panels carefully, snapping them securely in place, but it is still only recognizing 4 GB. Am I missing something? All the specs seem accurate to a ‘T’. Help! I’m running 10,6.8 and ere are the specs as they’re showing:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8
    Serial Number (system): W8848K5N1AX
    Hardware UUID: AC1E04B8-E570-5669-B902-32110EF118B4
    Sudden Motion Sensor:
    State: Enabled

    • While rare, it is possible that either the memory itself or the RAM slot is defective.
      To determine which go to System Profiler > Hardware > Memory and make a note of which memory bank is showing the memory as active. Then physically swap the modules. If the issue follows the memory, then contact our Customer Service team to arrange for a replacement. If the problem follows the slot itself, then you will want to contact Apple for the repair.

      • Whether that was it, or just a case of 3rd time’s a charm, I switched the modules and voila… it’s recognizing and running at 8 GB. It’s like a new computer! Thank you very much for your help. I’m very pleased.

  • profiler says Boot ROM Version: MB51.007D.B03 but updater says this computer does not need this update. macbook 5,1 running 10.8.2 should my machine see the 8gb if I order it or is something other process needed?

  • Hey, so I checked out my system and everything looks good! The only thing I need help with is finding the right ram chip to buy for it. If you guys could link me to some sources that would be awesome! Thanks!

  • I have followed all these instructions, I am using a Mac Book Pro5,1 late 2008 on, MBP51.007E.B06 Mountain Lion OSX 10.8.2.

    I have added the RAM but on the about this mac section it only says 4gb for the memory?

  • Hey guys, great article! Was on the fence about upgrading my memory to 8gb but will do so now. I have model id MacBookPro 5,1; boot rom ver MBP51.007E.B06; OS ver 10.6.8. Everything checks out according to this article but was wondering, would I need to run the OS in 64 bit kernel once I upgrade my memory? I’ve read in some forums to do so and some say you don’t have to. Sorry if this was already addressed earlier in the article. Anyway, thanks in advance!

  • If I have a MBP 15″ 2.4Ghz Late 2008 5.1, with the newest firmware installed but am lacking an Express Card Slot, could I still update to 8GB Ram? My computer is extremely slow and I’d like to try smth before actually buying a new one. On an unrelated note, does the new 2012 MBA outperform the old 2008 MBP?

  • Hi Guys

    I have a MacBook Pro 15
    Model Name: MacBook Pro
    Model Identifier: MacBookPro3,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.6 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 4 MB
    Memory: 4 GB
    Bus Speed: 800 MHz
    Boot ROM Version: MBP31.0070.B07
    SMC Version (system): 1.16f11
    Serial Number (system): W880815DXAG
    Processor 2.6 GHz Intel Core 2 Duo
    Memory 4 GB 667 MHz DDR2 SDRAM
    Your computer’s firmware is up-to-date with version 1.5.1 of the MacBook Pro EFI Firmware Update.

    My question is can, I upgrade memory from 4 to 8GB ?
    Thanks for your help

  • hey guys….
    ive got a mac that has and hasnt been addressed….
    ive got a late black macbook model4,1 that the article said was initially affected. then it goes on to say though that this model # doesnt need the efi update. BUT – nowhere else is anything mentioned about whether it can take 8gbs of ram…

    so again, ive got a late 2008 BLACK MB MODEL4,1 that allegedly doesnt need the efi update…

    can i install 8gb of ram or am i stuck at 6? (and therefore being uneven which i heard isnt that great…)

    thanks so much guys…you guys really do rock! :)

  • Hi guys love the article can my mac support 8GB of ram if so Ive tried to download the firmware on your page but when I try to install it says that my mac doesn’t need it. Here is the spec of my Macbook Unibody Cheers.
    Josef.

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.40f2
    Serial Number (system): W89203U68QT
    Hardware UUID: B0012B04-555B-55ED-9F13-B81486D1B049

    • There are only three small things to check to make sure you can run 8GB reliably on the Late 2008 MacBooks and MacBook Pros.

      1.) You need the proper model machine: You have a Machine ID of MacBook5,1 – this is one of the models that are eligible, so you’re good there.

      2.) You need the proper Firmware Revision: You have firmware revision MB51.007D.B03 – this is the proper firmware revision to run 8GB, so you don’t need to run the firmware upgrade – if you do, it’ll just say you’re already upgraded.

      3.) You need to be running 10.6.8 or later: you didn’t say which version of OS X you’re on. An easy way to tell is to check your Apple menu – if there’s an option for the App Store, you’ve got at least 10.6.8

      So, as long as you’re running 10.6.8 or later, you should be good to go.

      • thank you for your support. I have a early 2008 macbook pro 15″ laptop. is there a way to get 8gb of ram? apple store the max is 4gb. when i talked to an apple tech in washington (main office), he had the same year and laptop as i do and he mention the max ram he was able to put in his was 6gb. he also install a 250gb sdd. do you have any idea how i can install 8gb of ram?

      • Hi. I have all 3 requirements fulfilled (macbook 13” late 2008, MB51.007D.B03, OS X 10.8.4, 2x4GB installed) and my Mac recognizes that I have two 2GB memory cards….What am I doing wrong? Can I get 8GB on my laptop?

        • I would recommend trying the following trouble shooting tips:

          Try a reseat (re-install the memory)
          Try a SMC Reset
          Try a NVRAM/PRAM Reset
          Try booting your MacBook with a single stick of Memory

          If you are still having issues or have identified a bad stick of memory please feel feel to contact our Technical Support Team at 1(800)275-4576 via Live Chat or Email to help troubleshoot

  • Thank you for this great article, very precise and clear, I had just bought my 8GB upgrade kit and was about to upgrade when I read in my macbook manual that I could only put 2x1GB or 2x2GB….!!
    I googled “macbook alu 2008 8GB” and found all the answers I could wish for on this page, thanks :)

  • Hey, by reading this article I decided to buy the 8gb Ram (2x2gb) for my Macbook Unibody Late 2008. My computer is currently running mountain lion and has Model Identifier: MacBook5,1 and Boot ROM Version: MB51.007D.B03 as specified. When I installed the 8 gb set my computer was unable to boot up. Hope I can recieve some advice from you guys.

    • Try re-seating the memory – if it isn’t making connection fully in the slots, the machine won’t boot. If that doesn’t solve the problem for you, please contact our Technical Support Team at 1(800)275-4576 via live chat or email and they will be more than happy to assist in troubleshooting.

      • I had the same issue as James had. I purchased an 8GB RAM upgrade after reading this article. My Boot ROM Version is MB51.007D.B03. My Model Identifier is MacBook5,1. I have Mountain Lion. I called tech support and was not able to find any solution after speaking with a representative for over an hour. Have there been other similar cases? Is it possible that this does not apply to Mountain Lion?

        • It’s not likely a Mountain Lion issue, as I am personally running the latest version of Mountain Lion with all the corresponding software updates on a MacBookPro5,1 (which was pretty much an identical update) and I haven’t had so much as a hiccup with booting, save for the need for an SMC reset due to a janky power supply.

          Unfortunately, the Blog comments are not really designed for troubleshooting; you’d be better served via our techs (possibly through email, to prevent hours on the phone). However, let’s see what kind of “shotgun” solution I can offer.

          Troubleshooting something such as this is mostly a process of elimination. Try taking your MacBook back to the OS version and memory configuration prior to the 8GB and Mountain Lion, then upgrade one piece at a time. Since the firmware is already applied, it shouldn’t change, but double-checking in System Profiler wouldn’t hurt.

          TI’d recommend starting with the memory – one piece at a time – and see if you can boot after installing. Then, add the other piece. If that works then UPGRADE (don’t just swap in a different drive) to Mountain Lion and see if it goes well there.

          • Just to clarify – I should go back to Snow Leopard (which is what I had previously), install the RAM, and then upgrade back to Mountain Lion?

            • In order to determine where the failure is happening, it’s best to rebuild one piece at a time. So, yes, go back to Snow Leopard and your original RAM configuration. Make sure that boots and works normally. Then, add ONE memory module. See if that works. If it does, add the second. If 8GB works under Snow Leopard, try upgrading to Mountain Lion via the App Store (if you purchased, should be a free download again). Don’t just swap out the hard drive to a 10.8 drive – that could be the point of failure, too. The trick is to change ONLY one thing at a time. Swapping out the drives would change two things (OS version and the drive itself).

              If it works, then… well… it’s working. If it fails, you will at least have a better idea where the troubles are occurring. At that point, a call to our Technicians should help get you on your way.

  • hi i just purchased an 8g ram card for my late 2008 macbook 13in and i was reading that you have to do something with the firmware, i am currently running mac os x lion 10.7.4 and the boot rom version is MB51.007D.B03 Would i have to do anything besides put the 8g ram card in? Thanks owc

    • As stated in the article, if you have a Late 2008 MacBook, and a firmware revision of MB51.007D.B03, your MacBook should be able to recognize 8GB of memory.

      You would get this 8GB by installing a pair of 4GB modules, not a single 8GB module. This is the kit you would want.

  • Hi Guys-
    I would like to upgrade the memory on my late 2008 Unibody Macbook. It has the 2.4 GHz processor, with 2 Gb of RAM; it is totally stock, including original OS it came with. Is an 8 Gb RAM upgrade possible for a newbie like myself? It sounds like I may have to upgrade the OS first. Is that true? If so, in what order should I perform what steps?

    Thanks

  • hi guys, thanks for all the research, and info.!! however i still have a question … i dont know much about computers, i do know, that i want the 8 gb ram (2 X 4 gb)*
    today i’been told in best buy that i should not buy the crucial, or other brand, because they’ve been having trouble with that, and i should just buy the kingston. in the other hand they told me to buy the 1067 ghz.
    the i went to comp-usa, and a technician told me that mac work better with 1066 ghz…!!

    i have a late 2008 MBA.
    so now im a bit confused, and i don’t know what to buy…. 1066 or 1067 ghz ???

  • Hi! i use macbook 5,1 unibody and use 8 gb ram but my OS is still 10.5.8 and i dont find any problem in it (my firmwire is updated to those u said). The point is do i need to update my OS to SL/lion/mountain lion? what’s the effect if i only use 10.5.8 with updated firmwire but installed 8 gb memory ram?

    thx in advance

    sorry for my bad english

    • You must be running Snow Leopard or later to address 8GB on these systems, and our testing was done with 10.6.6, which is the earliest version we’re currently supporting for this. We do not support 8GB of memory under OS X 10.5.8 on these machines.

  • Hi, I’m new to this upgrading thing so I’m not sure what I’ll be doing to upgrade my Macbook.

    I have a macbook pro late 2008 model 2.53ghz intel core 2 duo. Currently, I’m running Mountain Lion on it, and installed the efi upgrade to stop the internal flickering. From what I read so far, this should be sufficient to be able to upgrade my RAM. I’m just stating it to confirm that I can, so, can I upgrade my maximum ram to 8gb?

    Also, if I can already upgrade with these specs, what kind of RAM should I get? Is there a specific type of RAM to buy?

    Thanks!

  • Hey OWC, I just ordered 8gb of RAM from you guys yesterday, and it stemmed from me recommending a friend to your site. I started looking around and ran across this fact that I could update my late 2008 unibody. Just wanted to say thanks for doing such a kickass job at what you do. I’ve been using and recommending your site since about 2007-08. You guys have consistently done a great job and have been so trustworthy. I was steered to you guys from an Apple Care tech back then and it was the best Mac advice I have ever received. Keep up the great work guys!

  • I have an old MacBookPro1,2
    Intel Core Duo,
    2,16 GHz
    (MacBook Pro (17-inch) MacBookPro1,2 MA092xx/A 17″/D2.16G/1G/120/SD-DL)
    Do you think this would be able to run more RAM than the 2GB it holds maximum?

  • OWC Michael i speak with your worker today. Now i have this macbook http://eshop.macsales.com/Descriptions/specs/Framework.cfm?page=macbookmid09.html
    And my i have two question. I read that my macbook 5.2 can have 8 gb of ram
    https://discussions.apple.com/thread/3345836?start=0&tstart=0
    Can you confirm it.
    And second question. I want to play future soldier. For play it in normal stage, without slow, without glitches… on what depend it much? I mean. For example, if i buy 6gb ram or 8 gb of ram? did the game will work normal, or if i stay with 2 gb of ram and buy new processor 2.30ghz will it work much better, or if i stay with 2 gb ram and 2.13 ghz processor, and buy new video card, what will happend if i don’t buy new processor and don’t buy ram, and buy new video card? how it will work? My question is that. When i buy 6 gb ram or 8 gb ram, what will happend with future soldier, is it will run normal.

    Thanks

    Best Regards

    Plamen

    • Ok, we still only support up to 6GB of OWC RAM in those machines….Here’s why:

      In our MaxRAM testing, we not only check that the memory shows up, but that it is fully being utilized by the system.
      Yes, the machine can recognize when 8GB of RAM is installed – HOWEVER (and this is a BIG HOWEVER), when more than 6GB of memory is actually addressed, the system as a whole slows down and the hard drive is then relied on for paging / virtual memory. We have tested with the latest firmware update and that system slowdown above 6GB still does occur. So, as there is no system benefit to installing more than 6GB of memory, we simply don’t support it.

      Now the second question…
      This one has me a bit stymied – but it may just be some assumptions I’m making. Are we taking about “Tom Clancy: Ghost Recon – Future Soldier”? If so, AFAIK that game as not been released for OS X – so, you would need to emulate Windows XP SP3 or better to run the game in the first place and Ubi Soft’s System requirements for PC includes a minimum 2.2GHz processor – which the MacBook falls a little short at 2.13GHz. The processor and video card in your MacBook are not upgradeable parts either, so I really couldn’t recommend expecting smooth gameplay if you can get it installed on the machine in the first place – regardless of the amount of memory you upgrade to.

    • Model Name: MacBook
      Model Identifier: MacBook3,1
      Processor Name: Intel Core 2 Duo
      Processor Speed: 2.2 GHz
      Number of Processors: 1
      Total Number of Cores: 2
      L2 Cache: 4 MB
      Memory: 4 GB
      Bus Speed: 800 MHz
      Boot ROM Version: MB31.008E.B02
      SMC Version (system): 1.24f3
      Serial Number (system): RM8123TJZ64
      Hardware UUID: D66F4843-5AA0-5CA9-8176-466DCBAAEEA2
      Sudden Motion Sensor:
      State: Enabled

      Can I Upgrade this to 6 or 8

  • Hi Michael, would really appreciate your help on this one.

    My specs:
    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

    As you can see, I updated my firmware to the latest version. But after installing two 4GB RAMs, only one of them is working. My first guess is that my machine is still only able to recognize 4GB of RAM?

    BANK 0/DIMM0:

    Size: 4 GB
    Type: DDR3
    Speed: 1067 MHz
    Status: OK

    BANK 0/DIMM1:

    Size: Empty
    Type: Empty
    Speed: Empty
    Status: Empty

    Would really appreciate some suggestions/advice on what I can try out to get them both working.

    Thanks
    Adrian

    • Doesn’t look like the DIMM1 slot module is making the full connection. Try switching the modules between slots and making sure they’re both pushed in all the way. If after switching the modules you still have a problem with recognition, at least the swap will give you a better idea of what you’re looking at – if the problem follows the RAM, then it could be a faulty module – if it stays with the slot, then there could be an issue with the slot itself.
      Our technical support team would be happy to assist in troubleshooting. You can contact them at 1(800)275-4576 via email or live chat.

  • Hi friends,

    HELP!
    I recently helped my friend update her late 2008 13″ Aluminum MacBook . Before I upgraded, I ran disk tools, updated her to Snow Leopard with all updates then installed Mountain Lion and the installed the correct 8GB ram as this article advised.
    While I was updating her programs the laptop did a silent random restart. It happened several times and once I got the new gray screen. I read some articles and reset PRAM and the SMC controller. It seemed to work fine for a couple of days but it started to shut down or gray screen again. Restarts some times give a message that ” your computer shut down unexpectedly” . Could this be faulty new 8GB Ram. I plan to put in 4 GB that came out of a similar MacBook and see it happens again but I’m worried that it may be Mountain Lion. She has had it happen both plugged in and battery.

    Her MacBook is 5,1 core 2 Duo, 2.0ghz
    Boot ROM MB51.007D.803
    SMC version 1.40f2
    Serial number W89170CM8QR
    Hardware UUID A115E58E-47C5-5033-9918-9C1C1C7BD888
    Sudden Motion Sensor: Enabled

    Any advice is appreciated. I’ll take it o Apple if it’s the OS upgrade and have them down grade to Snow Leopard.

    • While it is possible that it could be the RAM, it seems at first glance that you did a lot of upgrading and updating all at once. The first thing I’d do would be to repair permissions on the hard drive. If that doesn’t take care of it for you, run Apple Hardware Test to see if it recognizes any physical component issues. If after both the restart issues are not corrected, contact our technical support team for further troubleshooting at 1(800)275-4576, via email or live chat. We’ll get you up and running again.

  • Hi guys,
    can you confirm your 8 GB kit works with the following MacBookPro unibody late 2008 config :

    Model Name: MacBook Pro
    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2,4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1,07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.33f8

  • Hi,

    Below are the details of my Macbook. everything seems to be up to date but it still shuts down most of the times after a 2 or 3 of constant use. Am not sure if its a firmware problem or not… ( but my Firmware seems to be updated).

    Can you help ?

    Hardware Overview:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 3 MB
    Memory: 8 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8
    Hardware UUID: 3652B303-F288-52A4-A07C-9FDF3F3B83EE
    Sudden Motion Sensor:
    State: Enabled

  • Hi thank you for a great article, I thought I understood, however can you please confirm my MB will support 8gb? on mountain lion 10.8

    Hardware Overview:

    Model Name: MacBook Pro
    Model Identifier: MacBookPro5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.66 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 6 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MBP51.007E.B06
    SMC Version (system): 1.41f2
    Serial Number (system): W89093S471A
    Hardware UUID: 4A214F4B-795E-5F34-ACA6-CF8E4C1B2653
    Sudden Motion Sensor:
    State: Enabled

    Many thanks

  • Hello! Your article was great thanks! I have a Macbook5,1. (2.4GHz core 2 duo) Boot ROM version of MB51.007D.B03.

    Just upgraded to Mountain Lion, problem is when I tried to update it from the link you mentioned it says my laptop doesn’t need the update… Can I still upgrade my RAM to 8GB??

    • You have a computer with the appropriate ModelID (MacBook5,1).
      You have the proper firmware revision for your model as listed in the article (MB51.007D.B03).
      You are running 10.6.6 or later (10.8 is later than 10.6.6).
      You can install 8GB without any updates.

      • Thank you for clearing that out!

        My RAM currently runs at 1066MHz, would buying a RAM of 1333MHz cause any problem?
        Lastly, what setup would you suggest to optimise the system, one 8GB card or two 4GB cards?

  • So it looks like my 5,1 qualifies for 8gb (YAY!). Just wondering if there are any known issues with Mountain Lion? I upgraded today and wanted to buy some RAM asap but I am worried ML might have messed with my ability to use 8gb.

    THANKS!

  • Hello. I know that I am not going to get praised by everybody but question: if I run Windows 7 on my Macbook, will I be able to run 8gb without any trouble for stability of the OS?

    I bought my MB in late 2008.

    Please no “switch to OSX” answers as this is not the point of my question.

    Thanks
    Nick

    • Remember that just because you purchased you MacBook Pro in late 2008, that doesn’t necessarily mean it’s a Late 2008 MacBook Pro. This firmware update only allies to the 15″ Aluminum Unibody MacBook Pro, and the 13″ Aluminum Unibody MacBook, both released in late 2008. See above for instructions on determining whether or not you have the correct model.

      Theoretically, the firmware allows the machine to address the memory properly, outside the OS, so you should be able to use it with Windows as well. That said, you we have not explicitly tested compatibility under Windows, so we can’t give a definite answer at this time.

      However, the firmware update requires you to be booted to OS X, so if your machine is set up to run Windows only, this whole exercise becomes moot.

      • Hi Chris. thanks for quick answer. My MB boots ONLY on Windows 7 (64 bits). Therefore, it is not possible to update trhe firmware (or maybe there is another way than via OSX?).

        In that respect, I assume I should upgrade to 6GB RAM MAX?

        Best regards

  • Hello OWC Grant and OWC Chris S.,

    FYI, I have [x brand] 8 GB memory running Mac OS 10.5.5 and 10.5.8 in my MacBook Pro 2.6GHz Intel Core 2 Duo 17 NOV 2008 MacBookPro4,1. The memory is recognized running smoothly an faster than ever before for some time now, but as soon as I use Mac OS 10.6.8, 10.6.7, or 10.6.6 the os and apps bog down drastically. Even if I enable/disable secure virtual memory or enable/disable 64 bit OS extensions things bog down in any version of Mac OS Snow Leopard. Would you please test this 8 GB Ram system config in a Macbook Pro Early 2008 with Mac OS Leopard to verify this config is working. This way you can expand your sales to your customers that with the older Macbook Pros wanting 8 GB of memory.

    • We only sell and support OWC brand memory.

      All of our memory meets or exceeds Apple’s specifications for memory and, on occasion, through our OWC MaxRAM Memory Certification Program we will support our memory in larger configurations than Apple does on certain machines. Said certification does not apply to other brands, nor do we test other brands of memory.

      We have tested and re-tested our memory in the MacBook Pro 15″ & 17″ machines with model ID: MacBookPro4,1 (this includes models released both in early and late 2008) and have MaxRAM Certified them to use up to 6GB of OWC memory. Once the 6GB mark has been exceeded in actual memory usage (not just having it installed in the machine – but actually being addressed) the system slows down and/or loses stability. As such we do not support 8GB of memory in those machines.

  • Hi there,

    Just wanted to double check that my Macbook can take 8GB? I am running Mac OS X version 10.7.4.
    Could you also please send me a link to the exact ram that would be compatible?At the moment I am running 4GB 1333 MHz DDR3 but I have been told that I should be using 1066mhz instead?

    Hardware Overview:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.4 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.40f2
    Serial Number (system): W89120BD7WV
    Hardware UUID: CBDBE2BB-C1AF-591D-BE7A-D85C16BD677D
    Sudden Motion Sensor:
    State: Enabled

    Many thanks!

  • Hi!

    I have a MacBook from Late ’08 and after reading this article I’m pretty sure that 8GB RAM will work on my MacBook.

    But, last year, when OS X Lion came, I upgraded from OS X Leopard to OS X Snow Leopard and then to OS X Lion. And it worked great for about 1-3 months, it was just as fast as it was when I got it. But after that it got a bit slower, and its fastness reduced further and further. Right now it seems to have stopped reducing speed. Though now it is so slow that sometimes when I only use Safari and iTunes the little rainbow-coloured circle appears. So, in my opinion, it definitely needs a RAM-upgrade.

    And with OS X Mountain Lion coming soon, my question to you is: should I upgrade my RAM before or after I get OS X Mountain Lion?

    If needed, I have provided my specs:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03

    • While Apple’s official minimum RAM requirement for OS X Lion is 2GB, industry experts agree 4GB of RAM is the minimum that should be installed for optimum performance of typical daily computer usage. I’d definitely suggest more RAM sooner rather than later.

  • Hi

    I have late 2008 (alu body) MacBook:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 2 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03

    According to your articule I could upgrade my RAM memory to 8GB but I am not sure about bus speed compatibility. At the moment I have 2 x 1 GB DDR3 1067 MHz. Is it going to work with 2 x 4 GB DDR3 1066 Mhz Memory? How about 1333 MHz?

    I will be very grateful for your reply.

    Best Regards

  • Hi thank you for a great article, I thought I understood, however can you please confirm my MB will support 8gb? on lion 10.7

    Hardware Overview:

    Model Name: MacBook
    Model Identifier: MacBook5,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2 GHz
    Number of Processors: 1
    Total Number of Cores: 2
    L2 Cache: 3 MB
    Memory: 4 GB
    Bus Speed: 1.07 GHz
    Boot ROM Version: MB51.007D.B03
    SMC Version (system): 1.32f8

  • Hey OWC Michael,

    for the Macbook Pro 4,1 with 8 gb ram that you tested, was there any issue with slow down once you reached 8gb of usage? I only ask to confirm because I read online from other people who have tried it with Lion, that they have still had a slow down after reaching past 6 gb of ram usage: essentially making the other 2 gb unusable. Did you guys install the OS fresh? Maybe there is a proper procedure for being able to use 8gb with the 4,1 that others overlooked?

    It keeps saying error so I hope I have not posted this 10 times.