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Product Specs:
  • Technology: DDR3 SDRAM
  • Density: 4GB (4096MB)
  • RoHS: Yes
  • Pin Count: 204-pin
  • Op. Temp.: 0C to +85C
  • Data Rate: DDR3-1066
  • Speed: PC3-8500
  • CL: CL = 7
  • Cycle Time: 1.875ns
  • Voltage: 1.5V
  • ECC: Non ECC
  • Module Ranks: Dual Rank
  • Register: Non Parity
  • Low Noise 8-Layer PCB
  • Meets and/or Exceeds Apple/Intel Specifications
  • Fully compliant with JEDEC specifications
  • Free Installation Videos & Manuals
  • Warranty Safe Upgrade.
  • Why do I need more RAM?
Memory Trade in
Save money by trading in your original chips! View available memory rebates.
From the purchase date of qualifying memory from OWC, you have 60 days to trade-in your old memory for a cash rebate!
Just fill out OWC's online rebate form or contact OWC Customer Service after you receive and install your new memory.
This OWC Memory is compatible with... Learn how to find your Mac's model ID or PC specs
MacBook White Unibody
MacBook (Mid 2010)
(May, 2010)
Model ID: MacBook7,1
2.4GHz
MacBook White Unibody
MacBook (Late 2009)
(October, 2009)
Model ID: MacBook6,1
2.26Ghz
MacBook Unibody
MacBook (Late 2008)
(October, 2008)
Model ID: MacBook5,1
2.0GHz, 2.4GHz
MacBook Pro Unibody
MacBook Pro (17-inch Mid 2010)
(April, 2010)
Model ID: MacBookPro6,1
2.53GHz, 2.66GHz, 2.8GHz
MacBook Pro Unibody
MacBook Pro (17-inch Mid 2009)
(June, 2009)
Model ID: MacBookPro5,2
2.8GHz, 3.06GHz
MacBook Pro Unibody
MacBook Pro (17-inch Early 2009)
(January, 2009)
Model ID: MacBookPro5,2
2.66GHz, 2.93GHz
MacBook Pro Unibody
MacBook Pro (15-inch Mid 2010)
(April, 2010)
Model ID: MacBookPro6,2
2.4GHz, 2.53GHz, 2.66GHz, 2.8GHz
MacBook Pro Unibody
MacBook Pro (15-inch Mid 2009)
(June, 2009)
Model ID: MacBookPro5,4
2.53GHz
MacBook Pro Unibody
MacBook Pro (15-inch Mid 2009)
(June, 2009)
Model ID: MacBookPro5,3
2.66GHz, 2.8GHz, 3.06GHz
MacBook Pro Unibody
MacBook Pro (15-inch Early 2009)
(March, 2009)
Model ID: MacBookPro5,1
2.66GHz 2.93GHz
MacBook Pro Unibody
MacBook Pro (13-inch Mid 2010)
(April, 2010)
Model ID: MacBookPro7,1
2.4GHz, 2.66GHz
MacBook Pro Unibody
MacBook Pro (13-inch Mid 2009)
(June, 2009)
Model ID: MacBookPro5,5
2.26GHz, 2.53GHz
iMac Intel
iMac (27-inch Late 2009)
(October, 2009)
Model ID: iMac10,1; iMac11,1
2.66GHz, 2.8GHz, 3.06GHz, 3.33GHz
iMac Intel
iMac (24-inch Early 2009)
(March, 2009)
Model ID: iMac9,1
2.66GHz, 2.93GHz, 3.06GHz
iMac Intel
iMac (21.5-inch Late 2009)
(October, 2009)
Model ID: iMac10,1
3.06GHz, 3.33GHz
iMac Intel
iMac (20-inch Early 2009)
(March, 2009)
Model ID: iMac9,1
2.66GHz
Mac mini Intel
Mac mini (Mid 2010)
(June, 2010)
Model ID: Macmini4,1
2.4GHz, 2.66GHz
Mac mini Intel
Mac mini (Mid 2010 Server)
(June, 2010)
Model ID: Macmini4,1
2.66GHz
Mac mini Intel
Mac mini (Late 2009)
(October, 2009)
Model ID: Macmini3,1
2.26GHz, 2.53GHz, 2.66GHz
Mac mini Intel
Mac mini (Late 2009 Server)
(October, 2009)
Model ID: Macmini3,1
2.53GHz
Mac mini Intel
Mac mini (Early 2009)
(March, 2009)
Model ID: Macmini3,1
2.0GHz, 2.26GHz
PC Laptop
PC Laptops
Compatible with Intel / AMD Process based PCs capable with the specifications listed above. Memory complies with JEDEC Specifications, document JESD79-3B.

Customer Ratings

Write a Review 4.9 / 5 638 out of 654 (98%) reviewers would recommend this product
1 2 3 4 5 6 7
Verified Buyer
Reviewer: parsleymom Location: maryland Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Quick service April 10, 2017 I ordered this to increase the RAM on my husband's Mac Book. I am relatively comfortable with computers, but had never attempted before to change memory or other hardware. The item was perfect, easy to install and my husband's computer now works like new!

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: Jimba142 Location: Kings Lynn, Norfolk..UK Age: 45-54 Experience Level: Hobbiest Owned Product: less than a month
Rating: 5/5 Working well April 6, 2017 I wanted to update my 8 year old MacBook as far as I could so I fitted a 500GB SSD and wanted to expand the ram. Originally it came with 2GB which i later expanded to 4GB. El Capitan nearly killed it so I went back to yosemite. After reading posts here in the UK that said 4GB was the maximum, I read other posts saying with the correct boot rom version MB51.007D.B03 I could run 8GB. Tried Samsung cards but just got Kernal Errors. took the plunge and ordered OWC and bingo....works a treat! That's my Mac sorted for the next 8 years then! Thanks OWC x

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: NorWil Location: Melbourne Australia Age: 55-65 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 Never a problem April 3, 2017 Installation videos excellent Years of problem free RAM

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: thebuyerme
Rating: 5/5 Easy to install and very fast! April 3, 2017 Easy to install and very fast RAM memory! My MacBook Pro Mid 2010 15" has a new extra live. For sure I tell you that is 500% faster than before but with a new SSD internal disk. Install both parts!

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: Victorellas Location: Montreal, QC Age: 45-54 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Perfect April 2, 2017 Always is good to have more RAM.i did find what i was looking for.Mac is revived

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: BlueTone Location: North Louisville Age: 25-34 Experience Level: Hobbiest Owned Product: less than a month
Rating: 5/5 Purchased by Mistake March 31, 2017 I purchased the PC3-8500 by mistake. I notified OWC of my problem and they emailed me what I needed to get my refund. I received the package and quickly put it back in the mail. Once OWC received the shipment, they reversed the payment, and my refund was in my account the same day.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer
Reviewer: edohernandez Location: Chile Age: 35-44 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 is like i bought a new computer March 31, 2017 I have a macbook pro 13 mid 2010 that I was thinking of switching to a new one, but with this upgrade I think my old computer has rejuvenated. If you buy from Chile, like me, be patient because once in Chile it took more than 1 month to arrive.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer
Reviewer: elnegritotin Location: Bogota, Colombia Age: 25-34 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Perfect March 31, 2017 Very simple steps to follow in order to replace, no need to be a computer geek....I believe that anyone capable of reading and following instructions would be able to do it.

My macbook did indeed recognise the 16GB even though Apple states that the computer has a max of 8GB. I am very happy with the new specs on my machine and would recommend this easy upgrade to anyone that currently does not have the max 16GB already installed.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer
Reviewer: MacUserJim Location: Macon, GA Age: 45-54 Experience Level: Home User
Rating: 5/5 Thanks for the help March 29, 2017 This was my first time going inside my Macbook on my own. MacSales saved me a ton of money. Thanks for helping me identify the memory chips I needed for my machine. The installation was just as simple as your video tutorial made it look. All in all a great experience. I will be using MacSales for all of my future Macbook need.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: Pook Age: 35-44 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 16 GB RAM March 28, 2017 I talked with the representatives about my computer before ordering and I order per their recommendations. This was a great investment on my part and will do business with macsales for future MacBook needs.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer
Reviewer: Mac4life123456789 Location: Rhode Island Age: 35-44 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Like new March 26, 2017 Upgraded my old mac from a 2gb to the 8gb. Easy install and now my MacBook is like new. Fast as ever. Highly recommend

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: TheProfRobin Location: Castillon du Gard, France Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Installed in 15 minutes March 25, 2017 Of course, having been invited by MacSales to write a review before the goods arrived, it was inevitable that the day after writing it, the two 8GB memory chips for my MacBookPro Mid 2010 arrived the next day.

The packaging is good, protecting already well packed chips with a stiff padded plastic wallet. The chips escaped French import duty, probably because the amount due was less than it would cost to collect.

It took 5 minutes to unscrew the back off the Macbook and after spudging up the battery connector for safety, a further 2 minutes to snap the old 2 x 4GB memory chips out and drop the new ones in. I spent 3 minutes reconnecting the battery and vacuuming up old dust and particles before screwing the back on again.

Within 15 minutes of starting, the MBP was up and running and a quick check in "About This Mac" showed that both new chips were recognised. To the best of my knowledge, this is the only source of functional 8GB chips for this model of MBP and anyone interested may safely ignore any warnings they read that 2 x 4GB chips is the maximum that the mid 2010 MBP can handle.

I don't have any strict benchmark checks to run comparisons before and after and this will come with experience. I expect to see faster performance in Photoshop especially with less switching between memory and hd. The Activity Monitor shows CPU usage much lower than before, but of course, this is in % and the capacity is now double. Since I installed Sierra, the fan had been coming on a lot, but so far, one day on, it has not cut in once.

My 13 inch MBP mid 2010 is a work-horse (graphics and e-book formatting) and travels a lot, whilst its 15inch retina stays unscratched at home. Compared to its original 4GB memory and 250GB spinning hard drive, it now has 16GB memory and a 1TB SSD. I am extremely happy with this latest upgrade which is a lot cheaper than buying a new model.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer
Reviewer: moqcca Owned Product: less than a month
Rating: 5/5 RAM has made a difference March 23, 2017 So far, so good. I referred to the site's video for installation instructions - installation was very easy and straight forward. The extra RAM (going from 4 to 8GB) has made a difference. I can't speak for long-term quality or performance yet, but at this point I'm very happy and satisfied with the product.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: 2Tech4You Location: Norman, OK Age: 18-24 Experience Level: Hobbiest Owned Product: 1-3 months
Rating: 5/5 Great quality product! easy to install March 23, 2017 I got the package and the product was very well encapsulated and kept from harm when being delivered. It was very official and looked legit. Im not someone who knows a bunch about computer parts yet, however, I am an IT specialist, so it was very reassuring how well it was packaged and labeled. On another note, installing ram was surprisingly very easy. Be careful not to touch anything other than the sides or corners of the circuit panel. And be careful not to shove anything into place without making sure thats exactly where it goes. There are a lot of helpful videos on youtube or even on MacSales site that can help with the process. Overall, this product turned out great. I had to buy a used MacBook, 2010 to be exact, because I could not afford a brand new laptop. However I was desperate for some sort of laptop after my old one got liquid damage....beware of the distance of your coffee from your computer...so I researched used Macs and found the best bang for my buck. But I knew buying an old computer would have its downsides, so I researched and concluded that replacing the 2G ram it currently had, to 4G would be a good start. Later on I hope to replace the HDD(hard disk drive) with an SSD(solid state drive) which is just a way to increase speed and decrease the archaic technology that hard drives use to run on. This product was great though! highly recommend.

I would recommend this item to a friend! This review is from 4.0GB (2x 2GB) PC-8500 DDR3 kit for MacBook/MacBook Pro Unibody, iMac 2009, Mac mini 2009/2010. Customer Videos:

Verified Buyer
Reviewer: Rafi Location: Baltimore Age: 45-54 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 Great product, excellent customer service! March 22, 2017 Was able to chat with a technical advisor and order the correct product for my MacBook Pro.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer
Reviewer: Macman923 Location: Island Lake IL Age: 55-65 Experience Level: IT Professional Owned Product: less than a month
Rating: 5/5 Macbook memory upgrade March 21, 2017 The memory work great and it was very affordable.

I would recommend this item to a friend! This review is from 4.0GB (2x 2GB) PC-8500 DDR3 kit for MacBook/MacBook Pro Unibody, iMac 2009, Mac mini 2009/2010. Customer Videos:

Verified Buyer
Reviewer: SeniorMac Location: Pleasanton, CA Age: Over 65 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 Easy Memory Upgrade March 20, 2017 I upgraded memory from 2GB to 16GB on a mid-2010 MacBook . The information you provided was extremely helpful, and accurate. The first issue to be resolved was whether this particular MacBook could accommodate 16GB . . . your information said it could, and that was correct. Next, your video led me step-by-step through the upgrade process. The instructions were very clear and accurate.

I will definitely call on you again for my next Mac need.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

Verified Buyer
Reviewer: plong0 Location: British Columbia, Canada Age: 25-34 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Installation was quick and easy March 19, 2017 The RAM works really well. I chose OWC because they are the only ones who guarantee compatibility with the various mac models.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: Stoute Location: Barbados Age: 18-24 Experience Level: Hobbiest Owned Product: less than a month
Rating: 5/5 Great Product, great service March 16, 2017 Had the early 2009 mac mini just sitting around my house and figured i'd try to fix it up. It was virtually unusable with just the 1 GB of RAM, so i opted for the maximum. I went for the 8GB which worked fine after I updated the firmware. I Installed the ram and upgraded from snow leopard to El Capitan, and its like a whole new machine. I wish I had ordered an SSD along with the RAM and done the upgrades at the same time!

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: Jetjock Location: Illinois Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Easy installation March 16, 2017 I upgraded my wife's 2009 iMac to 16 Gb (max for this model). This is a cheap way to improve this old iMac's performance. Wife is happy. Very easy installation.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: mikieh Location: Plymouth Ma. Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 mac mini 2009 memory March 15, 2017 Easy upgrade for my mac mini. Glad I opened it up, not only upgraded, but blew 7 years of dust out of the way!!!

I would recommend this item to a friend! This review is from 4.0GB (2x 2GB) PC-8500 DDR3 kit for MacBook/MacBook Pro Unibody, iMac 2009, Mac mini 2009/2010. Customer Videos:

Verified Buyer
Reviewer: tcampbell86
Rating: 5/5 as described, good buy March 14, 2017 I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:
Verified Buyer
Reviewer: Kork Location: Los Angeles, CA Age: 35-44 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 great upgrade March 14, 2017 It was really easy to install the new memory and I can see a definite difference in my macbook pro's overall performance and speed. Glad I made this purchase!

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC-8500 DDR3 kit for iMac '09; MacBook/Pro Unibody '08-10; Mac mini '09/10. Customer Videos:

Verified Buyer
Reviewer: Reetesh
Rating: 5/5 Extremely satisfied March 13, 2017 I would recommend this item to a friend! This review is from 6.0GB (2GB + 4GB) PC-8500 DDR3 Kit for MacBook/MacBook Pro Unibody; iMac 2009 Models.. Customer Videos:
Verified Buyer
Reviewer: RJones Location: Maryland Age: 45-54 Experience Level: Noob Owned Product: less than a month
Rating: 5/5 Worked Great March 12, 2017 I was ready to trash my old Mac but decided to try some new memory first. Boy am I glad I did. It was a snap to install and my Mac is running better than new! I can't recommend enough.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-8500 DDR3 kit for Mac mini 2010, MacBook 2010, & MacBook Pro 13" 2010. Customer Videos:

OWC Memory 4.0GB 4.0GB PC8500 DDR3 Mfr P/N: 8566DDR3S4GB MacSales.com SKU: OWC8566DDR3S4GB OWC Memory Upgrade Module Lifetime OWC Limited Warranty Ships: Same Day only $41.99
Add to CartOther World Computing 8566DDR3S4GB In Stock, Click to Buy Now
Additional Capacities & Kits:
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  • 16GB (4x4GB)
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