“official” support is limited. Only RX570, RX580, Vega 56, Vega 64, WX7100, and WX9100. IRL more cards will work just fine with it like the RX470/RX480 and some other older AMD cards.
All the cards listed above are currently impossible to find at MSRP due to cryptocurrency mining issues, especially for RX4xx/RX5xx and Vega model cards so this is kind of a bad time to release this update IMO
Nvidia based GPU’s are officially not supported. While nvidia does provide drivers, supposedly they dont work great or at all over thunderbolt. This isnt greally great because generally speaking, more programs (especially adobe programs) can get better use from CUDA. Also, Nvidia is the only company that has any high end GPU’s currently (GTX1080ti, Titan V, etc)
while this is better for those who wish to do gaming on the macbooks/imacs, it’s still not great due to OSX’s poor support for anything gaming related (you’ll lost anywhere from 25-75% performance in games just by using OSX). Video editing, 3D rendering and any other GPu accelerated workloads on the other hand will get a huge benefit from this.
IRL Nvidia GPU’s should still work relatively OK with the provided webdrivers since Thunderbolt is just a normal PCIe connection. Its possible some lower level stuff might not work as seamlessly but it should be OK
THunderbolt 2 will not have support for eGPU according to Apple. 2015 machines and older can’t take advantage of this.
Looks like Apple is quite salty with Nvidia after all these years, they they just shun them entirely and those who want to stay official will get shafted by those GPU prices
Their Pascal drivers are pretty shitty. Wonder if that has anything to do with it. There’s a ton of posts on Mac forums saying that the drivers are causing wake from sleep display issues, display lag, etc…