@dosdude1
A guy may have found a fix to the graphics issue on the 2011 iMac:
https://www.reddit.com/r/mac/comments/con5xx/my_dad_gave_me_the_old_family_imac_its_a_2011/ewkg9oj/?utm_source=share&utm_medium=ios_app …
“It’s a Radeon 6750. I did have some issues at first, but found a fix in a forum. That fix was to delete the .kext driver for the GPU. After that, it runs great.” — u/leamanc
Yeah, I know about that. It helps with the weird colors issue, but there is still no graphics acceleration.