The real question is why would a GPU vendor go through the expense of creating and supporting such an implementation when Apple doesn't even make a computer with slots that you can install their video cards into?
If producing an OpenGL implementation doesn't provide a competitive advantage for selling their products, why would they bother?
Because it is a fact that Apple develops their own drivers. Also, when did you last download a driver update from NVidia for your Mac?
https://arstechnica.com/gadgets/2018/02/vulkan-is-coming-to-...
Article is about Vulkan, but briefly mention Apple's own outdated OpenGL stack.
http://renderingpipeline.com/2012/04/sad-state-of-opengl-on-...
From 2012. Which means it is still accurate, given how out of date drivers are.
There are more references, you can look it up.
> The real question is why would a GPU vendor go through the expense of creating and supporting such an implementation when Apple doesn't even make a computer with slots that you can install their video cards into?
They still have GPUs, which can be Intel, AMD or NVidia depending on year and model. Just because they are soldered on, doesn't mean they don't need drivers.
EDIT: Some more research seems to indicate that there are drivers developed by NVidia for the NVidia Quadro GPU line.
It doesn't seem to change anything on the OpenGL stack, unfortunately.
Last week.
Nvidia releases drivers for cards that the drivers which ship with macos don't support. I would also guess that the nvidia drivers which ship with macos are written by nvidia under some agreement with apple, same is likely true of AMD and intel.
(Ironically, using OpenCL avoids this problem)
That's a tiny part of Apple's lineup though.
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.