How to install MacOs Catalina on a Unsupported Mac - MacOS 10.15 Catalina - YouTube
Mac OS CATALINA on a 2011 IMAC. I kept hearing it won't work because of the video card and would make my Mac unable to use but it is working for me.
Apple iMac 21.5" 8GB 2.7GHz Intel Core i5 1TB (Late 2012) Catalina OS | eBay
Identify your iMac model - Apple Support
Apple All-In-One Desktops - Walmart.com
Apple iMac Late 2012 A1418 21.5" Quad i7-3770s 3.10 GHz 8GB RAM 1.12 TB HDD | eBay
How to Install MacOS Catalina 10.15 on an Unsupported Mac, iMac, Mac Pro or Mac Mini in 2022 - YouTube
Timetec 8GB Compatible for Apple DDR3L 1600MHz PC3L-12800 for Mac Book Pro (Early/Late 2011,Mid 2012), iMac(Mid 2011,Late 2012,Early/Late 2013,Late 2014,Mid 2015), Mac Mini(Mid 2011,Late 2012) MAC RAM at Amazon.com
How to Install macOS Catalina on an Unsupported Mac - MacRumors