re nvidia macs, try and get the io reg and dsdt dumps from the models you discussed. Maybe you can use the same code (with a little tweaking) I heard some guy use a mac dsdt just removing smc and fixing pci devices etc. see tip in post 17 on this subject. http://www.insanelymac.com/forum/ind...ic=145792&st=0 Sounds like a serious but fun undertaking and a worthwhile experiment as you will end up with a mac -efi at the end of it!! just make sure you dont apply cpu voltage changes in dsdt unless they are your entries!! cheers LS