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" Slim intel® Quad-Core i5 2.9GHz Late 2013 (Ricondizionato) macOS Catalina - Smart Generation
Apple iMac 27” Core i5 3.2Ghz, 8Gb, 768GB, 1GB GTX 675 MX OS 10.15
Big Sur on iMac 27", Mid 2011, flashed 4GB NVIDIA Quadro K4100M by Nikey22, having issues with screen brightness, any ideas? Brightness control was working with Catalina Patcher, after installing Big Sur
Installing Mac OSX Catalina on a Unsupported Macbook, iMac, & Mac - YouTube
Fix for "this version of macOS [10.15.7 or 10.14.6] cannot be installed on this computer." - YouTube
APPLE IMAC 16,2 LATE 2015 21,5″ I5-5575R RAM 8GB HDD 1TB MACOS CATALINA INTEL IRIS PRO 6200 1,5GB – Pc Ricondizionati