Apple iMac 21.5" Late 2012 A1418 Logic Board i5 2.9GHz 650M 661-7102 | MacKing
Review: 21.5-inch 2012 iMac takes two steps forward, one step back | Ars Technica
Install memory in an iMac - Apple Support
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
Teardown of New 21.5-inch iMac Reveals Glued Down LCD and Dual Microphones - MacRumors
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
8GB Memory (PC3L-12800, DDR3L 1600MHz) for Apple MacBook Pro 15 inch A1286 Mid 2012. Apple MacBook Pro 13 inch A1278 - Mid 2012. iMac 21.5 inch A1418 Late 2012, A1418 Early 2013,
Opened up 2012 21.5 iMac for SSD upgrade. | MacRumors Forums
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
Apple 21.5" Pre-Owned iMac Desktop Intel Core i5 2.7GHz 8GB Memory 1TB HDD ( 2012) Silver MD093LL/A - Best Buy
Late 2012 iMac becomes vintage/obsolete this month, but is eligible for pilot repair scheme - 9to5Mac