One reason is that there are kexts specific to each piece of hardware as well as the osx version. With 3 primary hardware components (mobo/cpu/gpu) there are co

One reason is that there are kexts specific to each piece of hardware as well as the osx version. With 3 primary hardware components (mobo/cpu/gpu) there are countless combinations to put together. When I set mine up, I couldn't find any specific guide that matched my set up. I actually couldn't find ANY that used my specific mobo. I frankenstein'd it together with a combination of easily 10+ guides. Had I been more motivated, it would have been perfectly reasonable to write up a guide myself.