Mac VR support is more confusing than you think
 

Early on in yesterday's WWDC keynote, Apple announced VR support in OS X, along with an external GPU dock for Mac developers. That news excited a lot of people. External GPUs, for what it's worth, work right now in macOS Sierra without huge issues (...
https://www.engadget.com/2017/06/07/...han-you-think/