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Product Specs:
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
iMac Intel
iMac (27-inch Mid 2011)
(May, 2011)
Model ID: iMac12,2
2.7GHz i5, 3.1GHz i5, 3.4GHz i7
iMac Intel
iMac (27-inch Mid 2010)
(July, 2010)
Model ID: iMac11,3
2.8GHz, 2.93GHz, 3.2GHz, 3.6GHz
iMac Intel
iMac (21.5-inch Mid 2011)
(May, 2011)
Model ID: iMac12,1
2.5GHz i5, 2.7GHz i5, 2.8GHz i7
iMac Intel
iMac (21.5-inch Mid 2010)
(July, 2010)
Model ID: iMac11,2
3.06GHz, 3.2GHz, 3.6GHz
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 5 / 5 39 out of 42 (93%) reviewers would recommend this product
1 2
Verified Buyer
Reviewer: Anonymous Location: Berkeley, CA Age: Over 65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Great price, super fast delivery April 22, 2016 Apple service diagnosed a bad RAM stick, probably installed by the previous owner of my used iMac. Even Apple suggested I buy 3rd party RAM to save money, so for a little more than Apple would have charged for one RAM stick, I jumped to 16 GB with an OWC kit of 4 matched RAM sticks. I've had excellent results with OWC RAM in the past, so I am confident this upgrade will also perform perfectly. Ordering on a Monday afternoon, I had the RAM in my hand 48 hours later via US Postal Service. Thanks to very clear instructional video by OWC, installation was a breeze. The iMac is noticeably quicker and now trouble-free.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Sacramento, CA Age: 25-34 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Will definitely buy more products from this place! April 18, 2016 Just installed these on my Mid 2011 iMac and it is so much faster. Went from 4GB to 16GB memory. I chose the free shipping that takes up to a week to deliver, but it got here in just a few days! I was worried about possible damage during delivery, but the packaging was very secure. I will definitely be buying more from this website. I'm thinking of upgrading my MacBook Pro now!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Princeton, NJ Age: 45-54 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Excellent. Improved the iMac performance February 18, 2016 Purchased to improve the iMac (Mid-2010) performance. This had 4 GB RAM. I use Adobe PS6 and LR5 and Illustrator a lot and found slow response. After upgrading to 16 GB computer response is excellent has been great.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: washington, dc Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Everything works great February 18, 2016 The item arrived on time and was installed in 10 minutes and works perfectly. Couldn't ask for anything more.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Australia
Rating: 5/5 Fantastic February 15, 2016 Great item, thanks.

Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: Portland, ME Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 My Second Memory Installation February 11, 2016 My iMac needed another memory upgrade and I always trust OWC's quality and service. Easy installation. DIY videos available. Mac's performance greatly improved.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Dubai - United Arab Emirates Age: 35-44 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 You are Professional October 23, 2015 Dear Sir, I have install the memory, and it was very easy. I love your package. I'm going to share my excellent purchased with my family members and friends. Your installation videos are awesome. Definitely I'm going to purchase again from you soon.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Venice, Italy Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 16.0GB (4x 4GB) PC3-10600 DDR3 1333MHz SO-DIMM 204 Pin CL9 SO-DIMM Memory Upgrade Kit October 6, 2015 I'm still using it after 5 years

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Mount Vernon, OH Age: 35-44 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 OWC RAM sticks trump other brand September 19, 2015 For my mid-2010 iMac, I went through two (2) different sets of RAM sticks purchased from a competitor - and each time was greeted with kernel panic reports from my iMac and system crashes. Apple recommended using a different brand - OWC to be specific - and I ordered 16 GB of RAM for next-day delivery. The package arrived the next morning, the RAM was installed that afternoon, and my Apple Hardware Test passed with flying colors. Thank you!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Ravels, Belgium Europe Age: 45-54 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Top product ! September 18, 2015 only a few days after I ordered the memory, I already received them in Belgium. all the way through the process, I could see the status of the order.

the memory was well packed and the installation was easy with the step by step guide video on the website.

Top Product, Top service, and Top quality !

I would recommend this item to a friend!

Verified Buyer Top 100 Contributor
Reviewer: Anonymous Location: San Juan, PR Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Excellent iMac Memory at a great price August 17, 2015 Great memory at a great price for my 2012 iMac. Great instructions for installation and no problems observed since installation 3 1/2 years ago. Love it.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Alexandria, VA Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Perfect Solution for My Windows Virtual Machine Slow-Down Issues June 29, 2015 I upgraded the memory on my iMac (3.6GHz Intel Core i5) and it fully resolved slowness issues I was having running a Windows virtual machine on my iMac. With the memory that came with my iMac (2x2GB), I would have to wait up to 10 minutes for an Excel file to open up. Often, Windows doing updates would make the rest of my iMac almost unusable (very, very slow).

With this memory kit installed, Windows files open almost instantly and I never experience slowdowns during Windows updates.

What a great solution!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Australia Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Memory Upgrade Kit June 22, 2015 I received the memory upgrade kit for my Mac , then checked the installation video, prior to attempting the install. i must admit it took three attempts before I got the Mac working correctly, but once installed everything worked fine, and I no longer get warning messages that my memory is getting critical! So thanks OWC for your supply and support.

Regards

Peter Dodd

I would recommend this item to a friend!

Verified Buyer Top 50 Contributor
Reviewer: Anonymous Location: Burlington, VT Age: Over 65 Experience Level: Power User Owned Product: 5-6 months
Rating: 5/5 RAM makes everything better June 4, 2015 More RAM = less offloading to HDD or SSD.... Simple, right?

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Tempe, AZ Age: 25-34 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 First time buyer June 1, 2015 I do not know much about computer hardware, but after doing my due diligence; I decided on OWC RAM to upgrade my iMac. I could not be happier with the enhanced performance. I use Adobe Suites for media production and web design (Adobe Premier, Audition, PS, and Muse). Increasing my RAM cut the rendering time on videos from over 2-hours to about 30-40mins. I would strongly suggest this product works great - performance is outstanding - made my mid-2010 iMac run as fast a brand new one.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Puerto Rico Age: 35-44 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 BEST COMPANY IN THE MARCKET!!!!!!!!!!!! April 9, 2015 AWESOME RAM MEMORY!!! Like Apple!!!! Because your are the best in the market!!!!!!!!!!!!!!!!!!!!! R&D Department is AWESOME!!!!!!!!!!!!!!!!!!!!!! Never an issue in ANY Client!!! With you almost 7 years!!!!!!!!!!!!!!!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Ontario, Canada
Rating: 5/5 2011 iMac is new again April 6, 2015 After installing this kit in a 2011/2012 2.4Ghz Corei5 21.5" iMac, the performance of the system improved 200%. Running 10.7.5 with 16GB is smooth and responsive.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Mexico Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Easier than 1,2,3 March 26, 2015 The entire process of analyzing the product needed, purchasing and installing could not be easier. A very satisfied customer.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Kamloops, BC Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Good product...good price! March 7, 2015 Time will tell with memory modules, but so far, so good. No problems installing and when tested they checked out just fine. I am happy with my purchase.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: USA Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 As advertised February 12, 2015 My memory modules arrived safely, installed easily, and operate flawlessly.

I would recommend this item to a friend!

Verified Buyer Top 50 Contributor
Reviewer: Anonymous Location: central VA Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Works. January 5, 2015 I got these shortly after purchasing the iMac. Extremely easy to instal, sped up the computer. Couldn't be happier.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Spokane, WA Age: 25-34 Experience Level: Gamer Owned Product: less than a month
Rating: 5/5 Top Shelf December 20, 2014 This was my first time purchasing and installing memory on a computer and I'm extremely glad that the users who populate the Apple Support Communities pointed me in the direction of OWC. It's the only website I had found that had memory specifically designed for iMac computers and they had the exact combination of sticks I needed for my mid-2010 iMac to max it out. The price seems reasonable to me ($50 a stick) and it was packaged immaculately. It's very obvious that OWC cares not only about quality, durability and reliability but also about presentation. The package also arrived in only three days when I was expecting it to take at least a week. The installation was very easy for a first-timer like myself and the accompanying installation video on OWC made sure that I got it right the first time. My computer runs incredibly fast now and almost feels brand new again. I can play all of my old games with the graphics settings on 'high' (instead of 'low') with no issues now. Thanks again, OWC!

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 High Quality RAM Upgrade November 4, 2014 Bought these to speed up my iMac and they worked perfectly. Easy to install, great quality, and excellent performance. I definitely recommend buying.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Australia Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Good Ram, Good price November 1, 2014 A must to improve your mac experience

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: southern california Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Perfect October 9, 2014 I purchased this memory for my iMac. Works perfectly. Customer service was great in helping me choose the memory.

I would recommend this item to a friend!

OWC Memory 16.0GB 4 x 4.0GB PC10600 DDR3 Kit Mfr P/N: 1333DDR3S16S OWC SKU: OWC1333DDR3S16S OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day Only $111.16Matched Kit for $99.00
Add to CartOther World Computing 1333DDR3S16S In Stock, Click to Buy Now