If you install an off-the-shelf graphics card from AMD in your Mac Pro (2019), you might experience these symptoms when using Boot Camp to run Microsoft Windows:
- No video to any display connected to the AMD graphics card you installed
- No video to any display connected to a Thunderbolt 3 port on your Mac
If you want to use your third-party AMD graphics card with Windows, follow these steps to remove the Apple MPX Module and its drivers, then install your AMD card and its drivers.
Use HDMI for video, if necessary
If you already installed your AMD graphics card and now have no video to your connected displays, you can use HDMI for video instead of removing your AMD card:
- Press and hold the power button on your Mac for up to 10 seconds, until your Mac turns off.
- Unplug all displays from your Mac, then plug a display into the HDMI port of the MPX Module.
- Start up your Mac in Windows again. You should now have video to your display.
- If you want to use your AMD graphics card for video, follow the steps below in Microsoft Windows.
Remove the MPX Module and its drivers
- In Control Panel, click Programs, then click Programs and Features.
- Right-click the program named AMD Radeon Software, then choose Change.
- Click Clean Uninstall, then follow the onscreen instructions to remove the drivers.
- Shut down your Mac, then remove the MPX Module.
As a result of removing the MPX Module and its drivers, the Thunderbolt 3 ports on the top and back of your Mac can no longer be used for video.
Install the AMD graphics card and its drivers
- Install your AMD card, if it's not already installed.
- Plug your display into your AMD card.
- Start up your Mac in Windows.
- Windows should automatically prompt you to install the drivers for the AMD card. If it doesn't, download and install the appropriate drivers from the Drivers & Support page of the AMD website.
- Restart your Mac in Windows.
If you want to return to using your MPX Module instead of your AMD card, the steps in Windows are similar to the above, but in reverse:
- Uninstall the drivers for your AMD card, then restart your Mac.
- Shut down your Mac, then install the MPX module and remove the AMD card.
- Connect your display to the HDMI port of the MPX Module, then restart your Mac.
- Download and install the latest AMD graphics drivers for Mac Pro.
- Restart your Mac. You can now use a different video port, if you don't want to use HDMI.