Any chance that high Sierra would work too? I upgraded my c2d e8400, ep45 ds3r from lion to Sierra wotw this guide. Works well...
Check system definition with compatible systems on Apple site for Sierra. You may need to change your system definition.Hi Boead,
I tried my Luck today and installed 10.13.4 with the new unibeast options legacy and old Nvidia drivers. The Installation ran through, but I didn't get to the login screen of 10.13.4. I guess I need to tweak the kexts somehow...