There are two further caveats to know: This is reversible when the SMC/PRAM/NVRAM is reset. Sudo defaults write LoginHook /Library/LoginHook/LoadX3000.sh Sudo chmod a+x /Library/LoginHook/LoadX3000.sh Kextload /System/Library/Extensions-off/AMDRadeonX3000.kext Sudo nano /Library/LoginHook/LoadX3000.sh Sudo kextload /System/Library/Extensions-off/AMDRadeonX3000.kextĪutomate this with the following LoginHook: You will have an accelerated iGPU display.īut the system doesn't know how to power-management the failed AMD-chip.įor that you have to either manaully load the kext after boot by: – wait for the kextcache process to finish Mv /System/Library/Extensions/AMDRadeonX3000.kext /System/Library/Extensions-off/ – only move ONE offending kext out of the way: – reboot into single user-mode by holding Shutdown, unplug everything except power, now holdĪt the same time until you hear the startup chime two times. – To start from a clean slate: reset SMC and PRAM/NVRAM: Thunderbolt data connections should work. the ability to drive an external display. This will give you back your laptop – but you will lose some features: e.g. To get some display acceleration back it will be necessary to force the machine to not boot into discrete graphics (dGPU) but directly into integrated graphics (iGPU). Having all AMD-kexts there except one is beneficial for 'proper' operation. This guide assumes that all kexts are still in their default location /System/Library/Extensions. This guide assumes that you run a stock system. Even if this post now will quickly drown in the sheer length of this thread, I think this is currently one of the better guides: The best option would be if AppleMacFinder would update the first post of this thread pointing to the best alternatives.Īnyway.
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