Thank you for your determination to come up with this workaround. This will be very helpful for those Macs with stubborn dGPU that interferes with eGPU.

Thanks for sharing this with the community!

Posted by: itsage

Thank you for your determination to come up with this workaround. This will be very helpful for those Macs with stubborn dGPU that interferes with eGPU.

Posted by: Flint Ironstag

Thanks for sharing this with the community!

I hope it works for the others, as well as other NVIDIA GPU based Macs having problems haha ;p

First of all, I am so excited when I see this post. But when I give it a try, I have encounter one problem, after downloaded the script and move it to the desktop. I use terminal to enter the command, all I get is this error message (sudo: ./purge-nvda.sh: command not found), did I do something wrong ? Can you help me ? Thanks.

I am using Late-2013 15" MacBook Pro GT750M+RX580@16Gbps-TB2(Akitio Node via TB3 to TB2 adapter)+MacOS High Sierra B4 (17A315i) 

Also I have already disable SIP.

 i wonder if the sierra beta also work with this method? can you work with nvidia audio on mac? thanks.

Posted by: ljtzeng

First of all, I am so excited when I see this post. But when I give it a try, I have encounter one problem, after downloaded the script and move it to the desktop. I use terminal to enter the command, all I get is this error message (sudo: ./purge-nvda.sh: command not found), did I do something wrong ? Can you help me ? Thanks.

I am using Late-2013 15" MacBook Pro GT750M+RX580@16Gbps-TB2(Akitio Node via TB3 to TB2 adapter)+MacOS High Sierra B4 (17A315i) 

Also I have already disable SIP.

Try this:

• Ensure you are in the Desktop on the command line: cd ~/Desktop
• sudo chmod +x purge-nvda.sh > then run that command.

Please read the post carefully and don't get confused of the purpose for this script. @mac_editor has had a heck of a time getting his 750M MacBook Pro to work in macOS High Sierra 10.13b with an AMD RX 480 eGPU. This workaround is to prevent the Nvidia dGPU from loading in macOS so that RX 480 eGPU can function.

There's no workaround for Nvidia eGPU in 10.13b yet.

Posted by: itsage

Please read the post carefully and don't get confused of the purpose for this script. @mac_editor has had a heck of a time getting his 750M MacBook Pro to work in macOS High Sierra 10.13b with an AMD RX 480 eGPU. This workaround is to prevent the Nvidia dGPU from loading in macOS so that RX 480 eGPU can function.

There's no workaround for Nvidia eGPU in 10.13b yet.

Precisely - I have been brainstorming a better title for the post for a while haha... this is ONLY FOR EXTERNAL AMD ACCELERATION ON HIGH SIERRA ON MACS WITH NVIDIA GRAPHICS INSIDE THEM.

Posted by: mac_editor

.....

Perhaps more research into the kext behaviors associated with graphics and displays on macOS High Sierra might allow for a script that makes a discrete Mac emulate an integrated-only Mac - with the script providing options to switch between these modes. Nonetheless, I think this workaround is a sufficient stopgap if anything until we "legacy" NVIDIA Mac users upgrade to newer models.

This project is on GitHub:  https://github.com/mayankk2308/purge-nvda

I sent you a PM but not sure it got through. Can you take a look at this workaround to disable dGPU in MacBook Pro and give it a try?

If it turns out universal and easily replicable, it would be great for users of MacBook Pro with a dGPU to soft-convert them into iGPU-only Macs.