so may I be better off DL sierra from my yosimite distro then trying to install it i.e proper apple dmg or can you think of a way I could get a proper copy of yosimite or el capitain, if you think I am more likely to have success with them over sierra also there are quite a few options for installing proper images, i.e via myhack, etc and then few options for bootloaders i.e clover, chameleon and enoch.....any advice?? thanks