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Macbook Pro 2011 - Disable AMD GPU
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mbp2011-disable-amd-gpu.md

1. Change the gpu-power-prefs and disable SIP

Boot into recovery single user mode (press and hold Command + S + R) and run the following commands:

nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00
csrutil disable
reboot

2. First of all, it is possible to successfully boot a MBP to OS X while still using the failed GPU, after you remove the AMD drivers by booting in command line mode (CMD+S) and entering these commands:

  1. fsck -fy (to check a disk)
  2. mount -uw / (mount a root filesystem with read/write permissions)
  3. sudo mkdir /AMD_Kexts/ (make a directory to store the AMD drivers in case you'll need them in future)
  4. sudo mv /System/Library/Extensions/AMD*.* /AMD_Kexts/ (move the AMD drivers)
  5. sudo rm -rf /System/Library/Caches/com.apple.kext.caches/ (remove the AMD drivers cache)
  6. sudo mkdir /System/Library/Caches/com.apple.kext.caches/ (just in case OS X will be dumb and will not recreate this directory, I am creating it for OS X)
  7. sudo touch /System/Library/Extensions/ (to update the timestamps so that new driver caches - without AMD drivers - will be definitely rebuilt)
  8. sudo umount / (umount a partition to guarantee that your changes are flushed to it)
  9. sudo reboot
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