Yosemite and the MacPro 1.1 / 2.1 3

By design it is not possible to install anything better than OSX 10.7.5 on a MacPro 1.1 or 2.1. Apple decided to abandon support for hardware that does not have a 64 Bit EFI bios and these machines only got a 32 Bit EFI. But there is a way to overcome this limitation by using ...