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4.0GB Apple-Hynix
Factory Original Memory Upgrade

4.0GB 1333MHz DDR3 SO-DIMM PC10600 204 Pin
Memory Image
Product Specs:
  • Technology: DDR3 SO-DIMM
  • Density: 4GB (4096MB)
  • RoHS: Yes
  • Comp. Count: 16
  • Depth: 256Mb
  • Width: x64
  • Pin Count: 204-pin
  • Op. Temp.: 0C to +85C
  • Data Rate: DDR3-1333
  • Speed: PC3-10600
  • CL: CAS 9-9-9-24
  • Cycle Time: 1.875ns
  • Voltage: 1.5V
  • Comp. Config: 128Meg x 8
  • 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
  • RoHS Certified
  • Free Installation Videos & Manuals
  • Warranty Safe Upgrade.
  • 90 Day OWC Fulfilled Limited Warranty
  • Why do I need more RAM?
This product 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 5 / 5 2 out of 2 (100%) reviewers would recommend this product
Verified Buyer Top 100 Contributor
Reviewer: Mdwycyoff Location: Indiana Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Adding RAM to a mid-2011 21.5" iMac is a no-brainer! January 25, 2016 I'm a bargain hunter, so I shop the OWC Garage Sales. I have no worries about system-pull or used Apple RAM from OWC. They stand behind their published warranty for such items. Do read the full item description with those details when purchasing. One time I did receive a DOA system-pull RAM module, and OWC quickly supplied a return shipping label for the defective one and shipped a replacement via the original delivery method at no additional cost to me.

My 2.5Ghz mid-2011 21.5" iMac is the last iMac of that screen size designed for easy user-installed RAM upgrades, by removing the bottom cover. Mine originally came with 4GB RAM (2x2GB) installed, with two empty slots. Over the two years I've owned it, I've upgraded it 3 times, first to 8GB adding 2x2GB, then to 12GB, replacing one set of 2x2GB with 2x4GB and now to 16GB RAM, replacing the other 2x2GB with 2x4GB, so it runs Yosemite 10.10.5 and El Capitan 10.11.3 beautifully, with no "Beachballs" caused by lack of available RAM.

The extra RAM also makes Windows 7 and Windows 10 run decently with 8GB RAM allocated under Parallels 10 in OS X Yosemite 10.10, while leaving enough RAM available to OS X to leave a Mac application or two running.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: St. Louis, MO
Rating: 5/5 OWC makes it very easy to upgrade your Mac's memory April 14, 2015 This is the third time I've purchased and installed memory purchased from OWC in an iMac or MacBook. Each time I received a first rate product that performed flawlessly. Installation was a cinch following OWC's videos.

I would recommend this item to a friend!

Apple-Hynix
Factory Original Memory
4.0GB 1333MHz DDR3 PC10600 So-DIMM Mfr P/N: APL10HYNDR3S4GB OWC SKU: APL10SOHYN4GB Used, System Pulls, OWC Tested. 90 Day OWC Fulfilled Limited Warranty Ships: Same Day
Supply Limited: 4 available
Only $100.00Garage Sale Price $24.75
Add to CartApple APL10HYNDR3S4GB In Stock, Click to Buy Now