gpu-switch is an application to switch between the integrated and dedicated GPU of dual-GPU MacBook Pro models for the next reboot.

It aims to remove the need of booting into OS X and running gfxCardStatus v2.2.1 to switch to the integrated card.

This is new code and it comes without any warranty! It's completely based on reverse engineering. Therefore use it at your own risk and don't blame us if anything breaks.

As root you can select the GPU by running gpu-switch and rebooting your machine:

# ./gpu-switch -i

# ./gpu-switch -d

WARNING: broken on macOS +10.12.4

Use $ ./build.sh to build gpu-switch. OS X can switch between the GPUs without having to reboot the MacBook:

$ ./gpu-switch -i

$ ./gpu-switch -d

$ ./gpu-switch -a

$ ./install_hooks.sh can be used to install Login Hooks to automate the swichting process for login/logout.

• Windows is using the MacBook's UEFI mode (how to check)
• Download the Windows Version
• Run the provided scripts by right click "Run as administrator" and rebooting your machine:
  • switch to the integrated GPU: integrated.bat
  • switch to the dedicated GPU: dedicated.bat

By default the Intel GPU gets switched off by the MacBook Pro 11,3's (and 11,5's) EFI if you boot anything but OS X. So to use the Intel GPU, you need to trick the EFI by using the "apple_set_os" hack either with:

• rEFInd version 0.10.0 or above (recommended): http://www.rodsbooks.com/refind

  Recent versions of rEFInd have the "apple_set_os" hack built-in. You can enable it by setting the spoof_osx_version option in your refind.conf.

or

• apple_set_os.efi: https://github.com/0xbb/apple_set_os.efi

or

• a patched GRUB:
• https://lists.gnu.org/archive/html/grub-devel/2013-12/msg00442.html
• https://wiki.archlinux.org/index.php/MacBookPro11,x#Getting_the_integrated_intel_card_to_work_on_11.2C3

or

• a patched Kernel: https://www.marc.info/?l=grub-deavel&m=141586614924917&w=2

Otherwise you will end up with a powered-down integrated graphics card and a black screen.

• MacBook Pro 5,2 (Early 2009, Non-Retina)
• MacBook Pro 5,3 (Mid 2009, Non-Retina)
• MacBook Pro 8,2 (Late 2011, Non-Retina)
• MacBook Pro 9,1 (Mid 2012, Non-Retina)
• MacBook Pro 10,1 (Mid 2012, Retina)
• MacBook Pro 11,3 (Late 2013, Retina)
• MacBook Pro 11,5 (Mid 2015, Retina)

If you are facing weird problems a NVRAM reset could help: http://support.apple.com/kb/PH14222?viewlocale=en_US

(Warning: this also resets your EFI boot configuration)

Copyright (C) 2014-2016 Bruno Bierbaumer, Andreas Heider, Malte Bargholz
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