Teardown of New 21.5-inch iMac Reveals Glued Down LCD and Dual Microphones - MacRumors
Timetec 16GB KIT(4x4GB) 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 : Amazon.ca: Electronics
iMac RAM upgrade: Here's an affordable way to improve multitasking - CNET
How to upgrade the RAM on the 27-Inch iMac (2020) | AppleInsider
Install memory in an iMac - Apple Support
Apple's new 'Assembled in USA' iMac a bear to upgrade, repair • The Register
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
Amazon.com: OWC 32GB (2 x 16GB) PC19200 DDR4 2400MHz SO-DIMMs Memory Compatible with Mac Mini (Late 2018), 27" and 21.5" iMac (Mid 2017), and Compatible PCs (OWC2400DDR4S32P) : Everything Else
Memory Upgrades for iMac 21.5-Inch 2012 - Late 2013
OWC Tears Down iMac Retina 4K, Confirms Memory Is Soldered
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
New 21.5-inch iMac least repairable yet due to lack of RAM, hard drive upgradability - 9to5Mac
CMS 16GB (4X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Apple® iMac Core I3 3.06 21.5-Inch (Mid-2010) - A28 at Amazon.com