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
SOLVED: What GPU's are compatible with iMac 27" 2011? - iMac Intel 27" EMC 2429 - iFixit
Schede video nVidia su Apple iMac 21 e 27 2009 | 2010 | 2011 con problemi di scheda grafica
2011 iMac Graphics Card Upgrade | How to | Mac Expert Guide