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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 Late 2011)
(August, 2011)
Model ID: iMac12,1
3.1GHz i3
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
Mac mini Intel
Mac mini (Mid 2011)
(July, 2011)
Model ID: Macmini5,1 & Macmini5,2
2.3GHz, 2.5GHz, 2.7GHz
Mac mini Intel
Mac mini (Mid 2011 Server)
(July, 2011)
Model ID: Macmini5,3
2.0GHz
MacBook Pro Unibody
MacBook Pro (17-inch 2011)
(October, 2011)
Model ID: MacBookPro8,3
2.4GHz, 2.5GHz
MacBook Pro Unibody
MacBook Pro (17-inch Early 2011)
(February, 2011)
Model ID: MacBookPro8,3
2.2GHz, 2.3GHz
MacBook Pro Unibody
MacBook Pro (15-inch 2011)
(October, 2011)
Model ID: MacBookPro8,2
2.2GHz, 2.4GHz, 2.5GHz
MacBook Pro Unibody
MacBook Pro (15-inch Early 2011)
(February, 2011)
Model ID: MacBookPro8,2
2.0GHz, 2.2GHz, 2.3GHz
MacBook Pro Unibody
MacBook Pro (13-inch 2011)
(October, 2011)
Model ID: MacBookPro8,1
2.4GHz, 2.8GHz
MacBook Pro Unibody
MacBook Pro (13-inch Early 2011)
(February, 2011)
Model ID: MacBookPro8,1
2.3GHz, 2.7GHz
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 19 out of 20 (95%) reviewers would recommend this product
Verified Buyer
Reviewer: Anonymous Location: Taos,NM Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 4/5 customer support helped May 13, 2016 Back in March 2016 I ordered and installed 4.0GB (2x 2GB) PC3-10600 DDR3 1333MHz SO-DIMM 204 Pin CL9 Memory Upgrade Kit for early 2011. Very soon I started having freezes and kernel panics with sequences of 3 very loud klaxon horn blasts. I immediately scoured the web for clues. Tried reset PRAM, new mouse, wired mouse, onyx ,rember, disk utility, google chrome browser and probably some terminal stuff. NADA. Finally called OWC customer service, and angrily asked for a return ticket(RMA). The service woman calmly told me to remove the ram chips and clean the copper contacts with alcohol and or a clan pencil eraser. Then reinstall, and reset pram. Its been two weeks and my Mac is running better than ever, no crashes, much smoother. I now know and recommend to call customer service FIRST. DUH! Thanks, Crashfree

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: upstate NY Age: 55-65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Additional RAM for iMac April 25, 2016 Fast shipping, easy install and reboot iMac and ready to go. Very good product. Website pointed me to the exact product I needed. I have confidence in OWC products.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous
Rating: 5/5 excellent transaction April 7, 2016 Very efficient and smooth

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: North Carolina Age: 35-44 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Good price and quality! March 31, 2016 Good price and quality. Great instructional videos. On-time delivery. Computer works faster and better after more memory install.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Port Alberni, B.C., Canada Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Easy installation December 1, 2015 Bought through OWC search for my computer type ram. Installed with ease and all working just fine. iMac 11,2 El Capitan.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Florida
Rating: 5/5 Exactly What I needed October 3, 2015 Customer service was great in making sure I was getting the right RAM and it works perfectly in my iMac. Very easy to install.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Age: 18-24 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 RAM, Simple, Delightful April 14, 2015 My family had forgotten what having RAM was like. Works great, no problems. It makes me happy.

Verified Buyer
Reviewer: Anonymous Location: CA Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Excellent! March 12, 2015 Excellent product and excellent online service! They walked me thru something I'd never imagine myself doing alone--adding memory to my computer. A BIG THANK YOU.

I would recommend this item to a friend!

Verified Buyer Top 250 Contributor
Reviewer: Anonymous Location: AZ Age: 55-65 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 Best Memory out there January 15, 2015 These memory products are the best I have found, never have I had a problem with this product. They deliver fast and the order is correct.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Rangiora, New Zealand Age: Over 65 Experience Level: Gamer Owned Product: over 6 months
Rating: 5/5 Improved the iMac performance January 12, 2015 The 4.0 GB extra memory was installed into an off the shelf iMac, doubling its memory. It speeded up a demanding FlightSim program and worked perfectly.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Boulder, CO Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 frustration gone after painless memory upgrade January 9, 2015 Was getting frustrated with the performance of my mid-2010 iMac. The Rainbow Spinning Wait Cursor (RSWC) was appearing far too often, and I had been putting off an OSX upgrade from 10.7.5 to 10.10, figuring things would be worse. So, I added 2*2GB DIMMs from OWC, to the 2*2GB DIMMs that came with the system. Things are much better now! I can have multiple browser windows, contacts, calendar, etc. all open at the same time. When I start Mail on top of those, the password input box appears nearly immediately, and the RSWC does NOT appear. Hooray! This is obviously removing a lot of paging stress from the system disk. Given that OWC provides an instruction video on their website, this upgrade could not have been any easier.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Connecticut Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Great Upgrade December 2, 2014 Great upgrade for any computer. Easy install, works as expected. Fast shipping. Absolutley no problems at all.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Portland, ME Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Easy Installation Better performance October 13, 2014 Was reluctant to add memory myself, so called OWC support to make sure I ordered the right "memory". Received package within 2 or 3 days and easily installed it in less than 10 minutes. MAC is now faster with several windows open at once. It's my first time doing something like this myself and I've learned a lot through the support at OWC.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Boone, Iowa Age: Over 65 Experience Level: IT Professional Owned Product: over 6 months
Rating: 5/5 Good price, arrived quickly September 1, 2014 Good, fast service. Good product.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Scottsdale, Az Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Good product & service July 31, 2014 Hardest part of installing memory expansion was unscrewing the panel on my Mac. Video made it clear & simple. Inserted new memory cards & closed panel back up. Turned Mac back on & success. Memory doubled from 4 to 8. Meets Apple specs at great price! Good, fast service.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Italy Age: 35-44 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 This product is OK! May 31, 2014 I would recommend this item to a friend!
Verified Buyer
Reviewer: Anonymous Location: Victoria, BC Age: 45-54 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Integrated perfectly May 12, 2014 This recommended RAM installed easily and immediately improved performance on my iMac.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Age: 45-54 Owned Product: over 6 months
Rating: 5/5 Good Quality April 22, 2014 The specification of the product is very clear and complete.The installation video is so clear and simple.You guy's definitely deserve a 5 stars.Thank you

I would recommend this item to a friend!

Verified Buyer
Reviewer: Robert Location: Vancouver Washington Age: Over 65 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 Product was as advertised & received quickly. August 18, 2012 Ordered 4 Gb memory set for 21.5" Intel i 5 iMac with USPS 7 day shipping. product arrived in 3 days to Vancouver WA. Will purchase from this retailer again.

I would recommend this item to a friend!

Verified Buyer
Reviewer: JohnCastleWriter Location: Los Angeles, California Age: 35-44 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Unbeatable price for a massive performance boost. October 6, 2011 I have the 2011 Mac Mini with the 2.3Ghz Core i5 and 2Gb RAM stock. I had to upgrade -- Lion just doesn't manage memory all that well yet as of 10.7.1, and 2Gb of RAM isn't a lot of memory to bring to the game when just running Safari and even one other app at the same time makes the machine choke.

OWC answered my prayers by letting me double my RAM for less than $40. For less than one good night on the town, I slipped a pair of OWC's 2Gb sticks into the Mini and booted up to a whole different experience. As of this moment, I have 3/4 of my memory free with almost a dozen apps running in the Dock and almost 10 more in the menubar.

Thank you, OWC, for offering such a dramatic performance improvement at such a reasonable price.

I would recommend this item to a friend!

OWC Memory 4.0GB 2 x 2.0GB PC10600 DDR3 Kit Mfr P/N: 1333DDR3S04S OWC SKU: OWC1333DDR3S04S OWC Memory Upgrade Kit Lifetime OWC Limited Warranty Ships: Same Day Only $33.98Matched Kit for $28.88
Add to CartOther World Computing 1333DDR3S04S In Stock, Click to Buy Now