Timetec 16GB KIT(4x4GB) Compatible for Apple DDR3 1067MHz / 1066MHz PC3-8500 CL7 Dual Rank for iMac (Late 2009 21.5-inch / 27-inch) SODIMM Memory MAC RAM Upgrade for iMac 10,1 and iMac 11,1 at Amazon.com
Install memory in an iMac - Apple Support
How to upgrade RAM in the (Mid 2017) 5K iMac and save up to ~$900 [Video] - 9to5Mac
Install memory in an iMac - Apple Support
Install memory in an iMac - Apple Support
Apple iMac 21.5 2009 3.06Ghz UPGRADE 8GB-RAM 1TB-HDD DVD OS10-15-7 One-owner Box | eBay
iMac, 2021, 24-inch, Apple M1, 512GB SSD, 8GB RAM, 7-core GPU, Green