Apple's 4K 21.5-Inch iMac Allows You to Upgrade RAM and CPU – Company Finally Dialing Down on Soldered Components, Reveals Teardown
Upgrading RAM On The New 27-inch iMac Is Easy, Here's How | Cult of Mac
Install memory in an iMac - Apple Support
iMac Retina 5K: Memory upgrade (RAM)
Memory upgrade: Apple iMac 2012/2013/2014 (Howto)
Upgrade your iMac 27'' 2017 RAM with MrMemory review - Wim Arys
How To Upgrade RAM in a Mac | Macworld
Memory Upgrades for 2019-2020 iMac 27-Inch - Up to 128GB
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
A-Tech 16GB (2x8GB) RAM for Apple MacBook Pro (Early/Late 2011), iMac (Mid 2010 27 inch 4-Core, Mid 2011 21.5/27 inch), Mac Mini (Mid 2011) | DDR3 1333MHz PC3-10600 204-Pin SODIMM Memory Upgrade Kit at Amazon.com
The New 2017 iMac: Notes & Tidbits on RAM - The Mac Observer