It's also due to Nvidia's unwillingness to collaborate. AMD allows Apple to maintain their own fork of AMD's drivers for macOS. From what I've heard, AMD also k

It's also due to Nvidia's unwillingness to collaborate. AMD allows Apple to maintain their own fork of AMD's drivers for macOS. From what I've heard, AMD also keeps a handful of engineers on premises at Apple campus to assist with work on this fork. Presumably, Apple wants the same from Nvidia, but Nvidia is notoriously secretive and protective and wants exclusive control over drivers for its hardware. It's easy to pin this on Apple, but Nvidia's lack of openness shows in FOSS too — where AMD has open sourced the Linux version of their GPU drivers, making AMD GPUs work great out of the box with Linux and allowing for the drivers to follow along with the latest in desktop Linux developments (Wayland, etc), Nvidia has stubbornly insisted on keeping their drivers closed, making for a frustrating install experience, and has actively impeded the development and adoption of Wayland.