Apple's management doesn't want Nvidia support in macOS, and that's a bad sign for the Mac Pro

The first Mac to include a graphics processing unit by Nvidia was the Power Macintosh G4 (Digital Audio), which was released in January 2001 and continued an Nvidia GeForce2 MX. Up to then, Apple had been using graphics cards made by ATI and this change was significant for more than just switching to Nvidia. Rather than picking one manufacturer over another, however, Apple was actually choosing to work to the industry standard OpenGL.
Read more: https://appleinsider.com/articles/19/01/18/apples-management-doesnt-want-nvidia-support-in-macos-and-thats-a-bad-sign-for-the-mac-pro?source=Snapzu