Amazon.com: Early 2019 Apple iMac with 3.0GHz Intel Core i5 (27 inch Retina 5K Display, 8GB RAM, 1TB) (Renewed)
Memory Upgrades for 2019-2020 iMac 27-Inch - Up to 128GB
Adamanta 64GB (2x32GB) Memory Upgrade for 2020 Apple iMac 27" w/Retina 5K Display, 2019 Apple iMac 27" w/Retina 5K Display, 2018 Apple Mac Mini DDR4 2666Mhz PC4-21300 SODIMM 2Rx8 CL19 1.2v DRAM