NEMIX RAM Compatible for 128GB (4x32GB) DDR4 2666MHz PC4-21300 SODIMM Memory Upgrade for Apple iMac Mid 2020 (iMac 20,1/20,2) / Mid 2019 (iMac19,1) 27-inch w/Retina 5K, Late 2018 Mac Mini 8,1 at Amazon.com
ITR Apple iMac19,1 A2116 All-In-One - Refurbished computer equipment with genuine Microsoft software
A-Tech 16GB Kit (2 x 8GB) Memory Ram for 2019 Apple iMac 27 inch Retina 5K ( iMac19,1 A2115), 2018 Apple Mac Mini (Macmini8,1 A1993) DDR4 2666MHz PC4-21300 SODIMM : Amazon.co.uk: Computers & Accessories
iMac19,1 and iMac19,2 are supported in Mojave's 10.14.5 Beta 1! : r/hackintosh
iMac19,1 | Lookup Mac Specs By Serial Number, Order, Model & EMC Number, Model ID @ techable.com
32GB NEMIX RAM Memory for 2019 Apple iMac 27 inch Retina 5K (iMac19,1 A2115), 2018 Apple Mac Mini (Macmini8,1 A1993) - Newegg.com