I have a late model 2011 MBP. The discrete graphics card is toast so normally when I upgrade OS X I just do:
and remove the ATI kext files and reboot and all is OK. However with macOS Sierra I've discovered that root is now no longer privileged enough to do so with SIP enabled and I have to use:
into Recovery Mode and disable SIP. Then I will be able to remove the ATI kexts. However, with the broken discrete graphics card I can't boot into Recovery Mode. I just get a distorted Apple logo and the loading bar. The distortion is like an old interlaced green screen display.
Then the screen goes grey and reboots.
Is there any way to disable SIP other than CommandR? Or disable the ATI kext files from being loaded without first disabling SIP?