Ursprünglicher Beitrag von: originalmachead ,
Boot to original or Snow Leopard install disks (or other volume). This system can run the last version of OS X 10.7 "Lion" if upgraded to at least 2 GB of RAM. Although it has a 64-bit processor, it has a 32-bit EFI and cannot boot in 64-bit mode. It also does not support "OpenCL" running the default video card or the other build-to-order video cards that were offered via custom configuration. ''If this answer is acceptable '''please remember to return and mark it accepted'''.''