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Add TS2 MacBook Pro troubleshooting

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Mykola Grymalyuk
2021-10-21 15:50:16 -06:00
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docs/ACCEL.md
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@@ -10,6 +10,7 @@
* [Unable to switch GPUs on 2011 15" and 17" MacBook Pros](#unable-to-switch-gpus-on-2011-15-and-17-macbook-pros)
* [Erratic Colours on ATI TeraScale 2 GPUs (HD5000/HD6000)](#erratic-colours-on-ati-terascale-2-gpus-hd5000-hd6000)
* [Unable to allow Safari Extensions](#unable-to-allow-Safari-Extensions)
* [Cannot Login on 2011 15" and 17" MacBook Pros](#cannot-login-on-2011-15-and-17-macbook-pros)
The below page is for users experiencing issues with their overall usage of macOS Big Sur / macOS Monterey and the Legacy Graphics Acceleration patches. Note that the following GPUs currently do not have acceleration support in Big Sur / Monterey:
@@ -131,3 +132,24 @@ Due to an bug on the legacy acceleration patches, users won't be able to enable
This tool can be used to work-around this issue:
* [Non-Metal Safari Extensions](https://github.com/moosethegoose2213/Non-Metal-Safari-Extensions/)
## Cannot Login on 2011 15" and 17" MacBook Pros
By default OpenCore Legacy Patcher will assume MacBookPro8,2/3 have a faulty dGPU and disable acceleration. This is the safest option for most users as enabling dGPU acceleration on faulty Macs will result in failed booting.
However if your machine does not have the dGPU disabled via NVRAM, you'll expereince a login loop. To work around this is quite simple:
1. Boot macOS in Single User Mode
* Press Cmd+S in OpenCore's menu when you turn the Mac on
2. When command line prompt appears, enter the dGPU disabler argument (at the bottom)
3. Reboot and patched macOS should work normally
4. If you still want to use the dGPU, run OCLP's TUI app and enable TS2 Acceleration. Then root patch your Mac again
* `Patcher Settings -> Misc Settings -> TeraScale 2 Accel`
5. Either Reset NVRAM or set `gpu-power-prefs` to zeros to re-enable the dGPU
```sh
# Forces GMUX to use iGPU only (ie. disable dGPU)
nvram FA4CE28D-B62F-4C99-9CC3-6815686E30F9:gpu-power-prefs=%01%00%00%00
# To reset, simply write zeros or NVRAM Reset your Mac
nvram FA4CE28D-B62F-4C99-9CC3-6815686E30F9:gpu-power-prefs=%00%00%00%00
```