My Mac Book Pro is now stuck after Apple logo screen on a grey screen and after hours of search I found the problem is in my graphic card (this issue happen after updating to High Sierra).

So I need to disable the second VGA

I tried with

/sbin/fsck -fy /
/sbin/mount -uw /
mkdir /Disabled_System_Library_Extensions
cd /Disabled_System_Library_Extensions
mv /System/Library/Extensions/ATI* .
mv /System/Library/Extensions/AMD* .
touch /System/Library/Extensions

but I got an error :

operation not permitted

any idea to fix this or at least disable SIP ?


I am not able to boot to any GUI neither by safe mode boot nor verbose mode or even recovery mode, so I need to do it via terminal

I am only able to boot via single user mode

  • try Sudo Command if there is permission error ! – Amey Apr 24 '18 at 12:13
  • didn't work for me – Peter Wilson Apr 24 '18 at 12:22
  • try to reboot your mac and press ⌘+R when booting up (It Disables SIP System Integrity protection). Then go into Utilities > Terminal and type the following commands: csrutil disable reboot – Amey Apr 24 '18 at 12:30
  • recovery boot failed – Peter Wilson Apr 24 '18 at 12:43
  • Reset Smc And Pram and Nvram After That go – Amey Apr 24 '18 at 12:45

The only way to disable SIP is to go in through the recovery partition and disable it from there, so unfortunately I don't think that will be an option for you with the current state of the machine.

I would take a look at the answer for this question here: MacBook Pro How To Disable Discrete GPU Permanently from EFI

Booting into a different OS is probably going to be your best chance at success. Hope that helps!

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