Apple iMac (Late 2012) review (21.5- and 27-inch) | Macworld
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
Install memory in an iMac - Apple Support
Apple's 2012 iMac: Ready for its close-up (pictures) - CNET
Install memory in an iMac - Apple Support
Apple 21.5" iMac Late 2012 - Catalina, 1TB HDD, Intel i5 2.9GHz, 8GB RAM | eBay
Harder, better, faster, stronger: A review of the 27-inch iMac | Ars Technica
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
Apple iMac 13,1 A1418 2012 Intel Core i5 3330S 2.70GHZ 8GB RAM NO Screen/HDD/OS | eBay
A-Tech 32GB Kit (4x8GB) RAM for Apple iMac (Late 2012, Late 2013, Late 2014, Mid 2015) | DDR3 1600MHz PC3-12800 SODIMM 204-Pin Memory Upgrade at Amazon.com
21.5" iMac Has No User-Upgradable RAM; 27" Has Four Accessible RAM Slots - MacRumors
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
Install memory in an iMac - Apple Support
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
Apple's 27" iMac Late 2012 model. How to upgrade the ram to 16GB - YouTube
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