Amazon.com: 2019 Apple iMac with Retina 4K Display (21.5-inch, 8GB RAM, 1TB Storage) (Renewed) : Electronics
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
2019 5K iMac RAM Upgrade Guide - YouTube
How to Upgrade/Replace the Memory in a 21.5-inch iMac (2019) iMac19,2 - YouTube
OWC 16GB (2 x 8GB) PC21300 DDR4 2666MHz SO-DIMMs Memory Compatible with Mac Mini 2018, iMac 2019 and up, and Compatible PCs (OWC2666DDR4S16P) at Amazon.com
How to Upgrade/Install Memory in a 21.5-inch iMac (Late 2012– Mid 2014) iMac14,1 iMac14,3 - YouTube
Install memory in an iMac - Apple Support
Apple iMac 27-inch (2019) review: Apple iMac 2019 is a millennial trapped in the body of a baby boomer - CNET
How to upgrade the 27-inch 5K iMac (2019) with a massive 128GB of RAM [Video] - 9to5Mac
Review: The 2019 21.5-inch iMac 4K is iterative, not transformative | AppleInsider