2012 21.5-Inch Apple iMac Review: Slim, Sleek, And Stylish, But Far From Shallow | TechCrunch
New Lower-Cost 2014 iMac Teardown Reveals Memory Not User-Upgradable
Apple iMac (21.5-inch, 2014) review: A price cut for the 21-inch iMac makes it a mainstream machine - CNET
iMac Intel 21.5" A1418 and A2116 (2012-2019) Adhesive Strips
New 21.5-inch iMac least repairable yet due to lack of RAM, hard drive upgradability - 9to5Mac
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
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
Buy Used & Refurbished Apple iMac 21.5-inch (Mid-2014) 1.4GHz Core i5 500GB HDD 16GB RAM MF883LL/A - iMac