Share please your EFI. My 960 won't load) only cursor on black screen
What fix you have in dsdt for gpu?
I don't have any sort of fix in my DSDT for gpu.
I did forget about the AGDP work around that I am using. I use imac11,3 system definition and an imac14,1 board-id. If I don't do that I get a black screen.