Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
Don't Upgrade The RAM In Your New Apple iMac, Do This Instead
OWC 16GB (2x8GB) ram Upgrade PC3-12800 DDR3L 1600MHz sodimm 204 Pin CL11 Memory Upgrade Kit Compatible with Late iMac, Mac Mini, and MacBook Pro Computer at Amazon.com