Adamanta 16GB (2x8GB) Apple Memory Upgrade DDR3L 1600MHz SODIMM Compatible for iMac (Mid 2011, Late 2012, Early/Late 2013, Late 2014, Mid 2015), MacBook Pro (Early/Late 2011, Mid 2012), Mac Mini RAM at Amazon.com
Apple Adding Late 2012 iMacs to Vintage and Obsolete Products Pilot Program at End of January - MacRumors
MacOS Big Sur Compatibility & Supported Macs List | OSXDaily
How to Upgrade/Install Memory in a 21.5-inch iMac (Mid 2017) iMac18,1 iMac18,2 - YouTube
Apple iMac 21.5" All-in-One Desktop Computer i5-2500s 2.7GHz 8GB Ram 1TB Mac OS High Sierra MC812LL/A w/ Keyboard & Mouse
Identify your iMac - Apple Support
Apple iMac (Late 2012) review (21.5- and 27-inch) | Macworld
Late 2012 iMac becomes vintage/obsolete this month, but is eligible for pilot repair scheme - 9to5Mac
Identificar tu iMac - Soporte técnico de Apple
Apple iMac 21.5-inch 2.7GHz Quad-core i5 (Late 2012) MD093LL/A | mac of all trades