8GB 2 x 4GB DDR3 SO-DIMM DDR3 1333 PC3-10600 2011 Apple iMac ( 21.5 -inch) 12, 1
Model ID: iMac 12, 1 2.5GH z i5, 2.7GH z i5, 2.8GH z i7 / 2011 Apple iMac ( 21.5 -inch) 12, 1
Model ID: iMac 12, 1 3.1GH z i3 / 2011 Apple iMac (27-inch) 12, 2
Model ID: iMac 12, 2 2.7GH z i5, 3.1GH z i5, 3.4GH z i7 NEMIX RAM memory upgrades meet and exceed Apple and Intel specifications and are backed by Lifetime Warranty.