16GB -2x8GB Memory Ram Upgrade for 27" Apple iMac-13.2 Core i5 2.9GHz Late 2012 | eBay
Memory Upgrades for iMac 27-Inch (2012 - Mid 2015)
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
Install memory in an iMac - Apple Support
Apple iMac Late 2012 21.5-inch 2.7 GHz Core i5 Desktop DDR3 RAM Memory | Kingston
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
A-Tech 32GB Kit (4x8GB) RAM for Apple iMac (Late 2012, Late 2013, Late 2014, Mid 2015) | DDR3 1600MHz SODIMM PC3-12800 204-Pin SO-DIMM Max Memory Upgrade at Amazon.com
What Does It Take To Upgrade a 2012 iMac 21.5"?
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
How to upgrade RAM iMac late 2013 21.5inch - break & fix MOVIE - YouTube
4GB Ram Memory (PC3L-12800, DDR3 1600MHz) for Apple MacBook Pro 15 inch A1286, 13 inch A1278 . iMac 21.5 inch A1418 , 27 inch A1419 , Mac Mini A1347 ( Mid 2012 - Mid 2015) - MacWave
Apple iMac (27-inch, Late 2012) iMac13,2 | Memory RAM & SSD Upgrades | Crucial.com