Yes, once upon a time both Microsoft and Apple provided an implementation of OpenGL with their OS.
When Microsoft abandoned OpenGL for DirectX, GPU vendors produced their own OpenGL implementations because doing so provided a competitive advantage that allowed them to sell more product.
The question is, why would those GPU vendors do the same thing now that Apple is following the same path?
Apple doesn't even produce a computer with slots you can install their products into.
>EDIT: Some more research seems to indicate that there are drivers developed by NVidia for the NVidia Quadro GPU line.
Keep doing research, because NVidia provides downloadable Pascal drivers even though the last time Apple produced a computer with a PCI slot was the Cheese Grater Mac Pro which came out over a decade ago.
When Microsoft abandoned OpenGL for DirectX, GPU vendors produced their own OpenGL implementations because doing so provided a competitive advantage that allowed them to sell more product.
The question is, why would those GPU vendors do the same thing now that Apple is following the same path?
Apple doesn't even produce a computer with slots you can install their products into.
>EDIT: Some more research seems to indicate that there are drivers developed by NVidia for the NVidia Quadro GPU line.
Keep doing research, because NVidia provides downloadable Pascal drivers even though the last time Apple produced a computer with a PCI slot was the Cheese Grater Mac Pro which came out over a decade ago.
https://9to5mac.com/2017/09/27/nvidia-pascal-drivers-high-si...
Making sure nothing diminishes CUDA is very much in NVidia's competitive interest.