Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
NEMIX RAM 16GB Kit (2x8GB Upgrade) DDR3-1600 SODIMM PC3-12800 for Apple MacBook Pro Mid 2012 / iMac Late 2012 / iMac 2013, Late 2014, Mid 2015, Mac Mini Late 2012 at Amazon.com
Apple iMac (Late 2012) review (21.5- and 27-inch) | Macworld
Apple iMac 27" 2012 3.4GHz i7 A1419 ,8gb-Grade C (Minor Glass issue) - Usedmac
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
A-Tech 4GB RAM for Apple MacBook Pro (Mid 2012), iMac (Late 2012, Early/Late 2013, Late 2014, Mid 2015), Mac Mini (Late 2012) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
Timetec 16GB KIT(2x8GB) Compatible for Apple DDR3L 1600MHz for Early/Mid/Late Mac Book Pro(2011- 2012), iMac(2011- 2015), Mac Mini(2011- 2012) MAC RAM at Amazon.com
2012 - 21.5" iMac, 2.7GHz Quad Core i5 Processor, 8GB RAM, 500GB HD, N – The Apple Xchange - Preowned Apple Products and Services
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
Timetec 32GB KIT(4x8GB) Compatible for Apple DDR3L 1600MHz PC3L-12800 CL11 for iMac (Mid 2011, Late 2012, Late 2013, Late 2014 Retina 5K, Mid 2015 Retina 5K) SODIMM Memory Module MAC RAM Upgrade at Amazon.com