Refurbished Apple iMac 12,1/i5-2400S/8GB RAM/1TB HDD/AMD HD 6750M/21.5-inch/B (Mid - 2011) | Mac4sale
Memory Upgrades for Apple iMac 2011 Up to 32GB
OWC 8GB (2 x 4GB) PC12800 DDR3L 1600MHz SO-DIMMs Memory Compatible with 2011-2015 iMac, 2011-12 Mac Mini, and 2011-2012 MacBook Pro (Non-Retina Display) Models (OWC1600DDR3S08S) at Amazon.com
Apple iMac 21.5-Inch i5-2400s, 8GB Ram - Recompute
A-Tech 8GB RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Module at Amazon.com