Disable Unsupported GPUs
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Disable Unsupported GPUs
Introduction
Setting up the iGPU
Disabling the GPU
Option 1: Boot Flags
Option 2: Add Properties
Option 3: SSDT
Option 4: DeviceProperties
Misc
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Introduction

So you got your shiny new RTX 2080ti BLOWYMATRON edition but you've probably noticed there's currently no support for your GPU in MacOS Mojave. Well for those who are running Maxwell, Pascal or Turing GPUs there is still some hope for you with options to spare!
This is an information thread, for discussion please visit the r/hackintosh thread: How to disable your unsupported GPU for macOS​

  • A Hackintosh built off the Vanilla guide(This is a must as you need to have a clean system for this to work properly)
  • A GPU that is support in Mojave/Catalina(generally this will be an iGPU for most users here, check the GPU Buyers Guide to see if your GPU is supported. Keep in mind that using a Kepler GPU with Maxwell, Pascal or Turing GPUs will require more work)
  • Up to date Lilu.kext and WhateverGreen.kext​
  • A Plist editor: Clover configurator works fine

For those planning on using an iGPU, make sure to have the following enabled in your BIOS:
  • iGPU Multi-Monitor: Enabled
  • Primary Display: Enabled
And make sure to have your displays connected to the motherboards display outs

Unfortunately not, and the reason being is actually quite similar to how Nvidia's Optimus technology functions. You would first need a way to grab/encode the iGPU's signal, send it towards the discrete GPU, then have said GPU decode the signal and display it. One small problem, decoding the signal would require proper GPU acceleration which your unsupported GPU doesn't have. So you will need to use your motherboard's video out ports no matter what

Option 1:
  • Disables all GPUs that aren't the iGPU
  • Quick and easy with little work, avoid when possible as it doesn't always work
Option 2:
  • Disables all GPUs from one brand(ie: all Nvidia GPUs)
  • Only usable for Clover, Opencore users must use either options 1,3 or 4
Option 3:
  • Disables a specific GPU
  • Recommended for those who run Kepler GPUs with Maxwell, Pascal or Turing
Option 4:
  • Disables on a per slot basis
  • Recommended for those who run Kepler GPUs with Maxwell, Pascal or Turing

For those running OpenCore, I highly recommend reading the Disabling GPU Guide found in the OpenCore guide as this has specific OSI fixes for SSDTs
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Setting up the iGPU
Last modified 2yr ago
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How to disable your unsupported GPU for macOS
Prerequisite
BIOS Settings
Can I use the iGPU for rendering but the video outs of my dGPU?
Which Options should I choose?
OpenCore Users