Harder, better, faster, stronger: A review of the 27-inch iMac | Ars Technica
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
Timetec 16GB KIT(2x8GB) Compatible for Apple Late 2015 iMac (27-inch w/Retina 5K Display)
Install memory in an iMac - Apple Support
Apple iMac 27" Desktop Core i5-3407S 2.9GHz 8GB RAM 1TB HDD Mojave OS 2012 w/ Keyboard & Mouse
Install memory in an iMac - Apple Support
Apple 2012 iMac 21.5" Core i5 2.9GHz 8GB RAM 1TB HDD - Poor Condition - computers - by owner - electronics sale -...
Apple iMac 21.5" - Core i7 3.1GHz (Late 2012) 16GB RAM 1TB Fusion - Very Good | eBay
A-Tech 8GB 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
2012 21.5-Inch Apple iMac Review: Slim, Sleek, And Stylish, But Far From Shallow | TechCrunch
Teardown of New 21.5-inch iMac Reveals Glued Down LCD and Dual Microphones - MacRumors