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64.0GB OWC Memory Upgrade Kit

4 x 16GB 1600MHz DDR3 SO-DIMM PC3-12800
OWC Memory Lifetime Limited Warranty including the OWC Lifetime Advanced Replacement Program | 30 Day Money Back Guarantee
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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.
- Please allow up to 14 Days from the time we receive your memory for testing and rebate processing.
- The OWC Rebate is for up to the same number of memory modules purchased and must be in working order.
This OWC Memory is compatible with... Learn how to find your Mac's model ID or PC specs
iMac Intel
iMac w/Retina 5K display
(27-inch Late 2015)
(October 2015)
Model ID:iMac17,1
3.2GHz i5, 3.3GHz i5, 4.0GHz i7
Detailed specs
Install Videos

Customer Ratings

Write a Review 4.9 / 5 349 out of 365 (96%) reviewers would recommend this product
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Verified Buyer
Reviewer: rickc519 Location: Bayville NJ Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Wow May 20, 2020 My iMac (27-inch, Late 2013) was running so slow and getting the beachball so much that it was virtually unusable. I started shopping for new one but the cost is really prohibitive. I was running with 8 GB of RAM (standard when it was purchased) but saw that the max I could use was 32 GB. I took a $180 gamble and ordered 32 GB of memory. It's like I have a brand new computer. Everything happens instantly when I click it, like it's supposed to. Thank you OWC for saving me ~$1500!!!

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: Kodiac99 Location: Visalia CA Age: 25-34 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 New computer! January 6, 2020 I just received my 16 gig memory chips and my old 2012 Mac book pro is running like new thank you so much. My Mac book pro is amazing and I could and did not want to spend 1k to get a new one this way I got to keep my computer I love. defend recommend this to anyone the videos made it clear on how to instal.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: BruceP
Rating: 5/5 Old Slow Laptop No More December 11, 2019 My old 2011 non-Retina MacBook Pro had become so slow and unpredictable that I cringed when thinking about using it. A deep system cleaning helped some but I felt a small investment in a RAM and SSD upgrade might be worth it. I replaced the 4 GB of factory RAM with 16 GB OWC RAM and at the same time replaced the 320 GB HD with a 500 GB SSD from macsales. Install was easy with the tools provided. I cloned my HD to the new SSD using SuperDuper!. The first time I powered up, everything was faster. Much faster. After a few weeks of usage, same: everything is super fast. Booting up, waking up, application opening/switching/quitting/etc, everything. It would be nice to know how much to attribute the performance changes to RAM vs SSD but for less than the price of a couple of cases of fancy beer, I'm thrilled to have what is essentially a brand new laptop. Now, my original battery is rather wimpy so maybe an upgrade there is in order.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: MACuser5252
Rating: 5/5 Great 16 GB RAM upgrade for Mac Mini 2012. December 8, 2019 Easily installed 16 GB RAM into Mac Mini 2012 (in addition to 240GB Mercury Extreme Pro 6G SSD), which is now blazing fast.

This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: otetz Location: Petah Tikva, Israel Age: 45-54 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Very Good October 23, 2019 Although officially declined, MacbookPro9.2 supports 16 GB of RAM. I think it was just the right time to do it. Swapping RAM was a piece of cake. Everything works as expected. Thank you very much OWC!

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: Datoe Location: Taiwan Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 A hassle-free upgrade October 15, 2019 You cam read tons of internet review hunting for cheap compatible rams from the PC side but you still have to bear a certain degree of risks. I would say just buy OWC rams. Just install them and enjoy your Mac

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: Josef Location: Bogota Age: 55-65 Experience Level: IT Professional Owned Product: over 6 months
Rating: 5/5 You made my day! August 27, 2019 Guys on Apple store told me my iMac was a vintage device with no support. I have already upgrade my vintage IMAC 21 late 2012. Memory upgrade to 16GB and SSD drive 1T. Now mine is faster than 2020 models. Save us$2000

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: Deltasworder1x
Rating: 5/5 Works great as advertised August 18, 2019 Works in both my Macbook and some of the laptops my family owns. I didn't know those computers could go that fast.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: iSpike Location: (OutBack country) Wild Western Australia Age: 55-65 Experience Level: Hobbiest Owned Product: 3-4 months
Rating: 5/5 Great improvement May 1, 2019 As an international customer owning a "late 2012 27-inch iMac" I am very happy with this upgrade expansion from my original 8GB to 32GB.l I have found that almost all of my programs open and run a little faster and I can efficiently run several open applications at the same time. I am very happy with this product and the service I received from the team at OWC. I will buy from OWC again. Cheers

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: wrlwind Location: USA Age: 55-65 Experience Level: Hobbiest Owned Product: 1-3 months
Rating: 5/5 Made a big difference in speed and ability of my MacBook Pro mid 2012 13 inch Laptop April 28, 2019 The speed and ability of my MacBook Pro increased and was able to handle a better work load to surf the net with more pages open but when I bought a SSD that made all things better. www.owc.com is the best place to obtain all upgrades I have found on the net while surfing and I come here often to see what the site has to offer. If I had more money in the bank this is where I would come and spend my money. Great prices and great service and very wonderful selection of electronic things to help with building or upgrading.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: 879Jackson
Rating: 5/5 Rejuvenized my MacBook Pro!!! February 16, 2019 Replaced the 4 gb memory in my 2012 MacBook Pro. Easy install with video instructions, less than 20 minutes. Turned it on and it is fast!! Thanks OWC.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: Urbain Location: Belgium Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 116gb ram upgrade from 4gb on 2012 MACbookPro 9,2 February 13, 2019 Completely new computer Runs Mojave 10.14.2 Was very slow an often saw color timer! Now 1second instead of 5minutes to swap user!!! Now uses 6mb ram instead of 3 before Just fantastic solution Your site is very good for confirming copatibility with hardware. Thanks a lot for premium service.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: Ihk09 Location: Colombia Age: 18-24 Experience Level: Gamer Owned Product: less than a month
Rating: 5/5 Exactly what u need February 12, 2019 Easy to find out if this work with your Mac. 5 mina to install. Works perfectly

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: macboy75 Location: Jersey Age: 18-24 Experience Level: Noob Owned Product: 1-3 months
Rating: 5/5 THIS WAS AMAZINGGGGGGGG January 14, 2019 Yo so many processing gainz i loved this product and it was the best purchase i made for my MacBook Pro. I HEAVILY RECOMMEND!!!!

THANK YOU OWC

The videos were extremely helpful and super easy to follow along with.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: landofbugs Location: New Haven, CT Age: 18-24 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Saved my 2012 Mac! December 19, 2018 A few weeks ago, my mid-2012 MacBook Pro suddenly shut down and started to beep out the code for a RAM error. Trying to turn it back on never lasted more than a few minutes before it shut down again, and none of the solutions suggested online related to reseating the RAM sticks worked.

This product did the trick! After a 5-minute install, my Mac was back to great working order.

A tip for anyone in a similar situation: A MacBook Pro can run fine on one stick of RAM. Try using each stick individually to see if one still works, and that will help you keep working while you wait for the replacement RAM to arrive.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: Bob11 Location: New Mexico Age: 55-65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 The memory works fine. November 20, 2018 Bought these for a Mid-2012 MBP to help speed things up a bit. As the day goes on it seems to help. It takes just as long to load things the first time as it did before, but that's macOS's fault. The memory is doing it's job.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: rfmilhous Location: Raleigh, NC Age: Over 65 Experience Level: Home User Owned Product: 3-4 months
Rating: 5/5 Added memory when changing hard drive November 19, 2018 When I switched to a solid state drive, I decided to double my memory while my MacBook was opened up. Easy installation and as usual OWC had easy to follow videos. The hardest part of the project was removing those tiny screws from tha back of the MacBook! I can’t really say if the increase in memory speeded things up since I switched to a solid state drive at the same time, but generally more memory is a good thing and the laptop is really flying now!

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: ZumbaGulu Age: 55-65
Rating: 5/5 Never crossed my mind November 11, 2018 It never crossed my mind that I could have 16GB of ram in my MacBook pro 9,2 until I saw it on the OWC site which i trust. I bought the 2x8GB Ram to replace my 2x4GB. Receive the package in good condition and installation was a breeze after watching the installation video.

This upgrade breathed a new life in the MacBook. It is definitely a more than welcomed upgrade.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: evans Location: Canberra, Australia Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Excellent product November 11, 2018 The memory arrived in good condition and on time. it was easy to install and has markedly improved the performance of my iMac.

I would recommend this item to a friend! This review is from 8.0GB (2x 4GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: Douggie Location: Australia Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Easy to fit, works exactly as expected. November 5, 2018 The 16 GB memory was sent from OWC promptly but delivery within Australia was slow (expected). When it arrived, there was less than ten minutes from shutting down to restarting. As promised, my MacBook Pro recognised the full RAM and where the amount of RAM is paramount, my computer has sped up. Six years old and it has a new lease of life. The RAM is now just quietly doing its job!

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: Grandy Location: Farragut TN Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Fits perfectly - Improves Instantly October 31, 2018 OWC’s memory for my old MacBook Pro laptop had enabled me to avoid trading it in on a faster model. The memory loaded up instantly and functions perfectly right out of the box. OWS’s great “how to” videos made it a snap and I am now one happy Mac user because I can keep my current machine going a few years longer.

I would recommend this item to a friend! This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: HSTBOY Age: Over 65 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 So easy! October 30, 2018 I had visions of a real effort required to upgrade my MAC till I looked on the web site and saw that there was a simple pop out door. The package was delivered quickly and the change is immediate. The old girl was getting pretty slow and now it is like a new machine for a fraction of the cost. I'm not sure how long the processor will be able to take SW updates, but till then, it's all good.

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Upgrade Kit. Customer Videos:

Verified Buyer
Reviewer: DerSchweisserBildhauer
Rating: 5/5 Satisfies that need for speed October 26, 2018 Lightning fast performance now on this 2012 MacBook Pro-! Maxing out the RAM to 16 gb, along with an SSD makes it perform better than ever imagined; running design, CAD and then CAM programs with Parallels, still no lag whatsoever. OWC's service is prompt and (again) delivered ahead of time. (A nice unexpected bonus included in the package to commemorate the 30th Anniversary of OWC was a mini screwdriver pen and a gift card voucher for an online winery- very cool!)

I would recommend this item to a friend! This review is from 8.0GB PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Module. Customer Videos:

Verified Buyer
Reviewer: TXiMacUser Location: Dallas, TX
Rating: 5/5 Excellent Memory October 21, 2018 Our iMac computer was slowing down at times due to an increased number of applications running on the background. This memory was so easy to install and it solved all the problems. No more slow downs.

This review is from 16.0GB (2x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 Memory Upgrade Kit. Customer Videos:

Verified Buyer Top 250 Contributor
Reviewer: c3nme Location: Omaha, NE Age: 45-54 Experience Level: IT Professional Owned Product: less than a month
Rating: 5/5 Fast wake from sleep and take your computer back from Facebook October 15, 2018 Facebook is a bad product for a lot of reasons. In this case, because of how much of the computer's resources it uses to display a web page. It is often driving the browser up past 3GB. On a machine with only 8GB of RAM, that makes the performance reduce in other areas. I was going to upgrade to 16GB, but opted for 32GB for my spouse's computer and was told that it made a big difference. An easy way to combat the resource hogging Facebook.

I would recommend this item to a friend! This review is from 32.0GB (4x 8GB) PC3-12800 DDR3L 1600MHz SO-DIMM 204 Pin CL11 SO-DIMM Memory Upgrade Kit. Customer Videos:

OWC Memory 64.0GB 4 x 16.0GB PC3-12800 DDR3 Kit Mfr P/N: 1600DDR3S64S OWC SKU: OWC1600DDR3S64S OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day
Reviews (365)
only $618.99
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