High Sierra, Apple's forthcoming MacOS update, will feature support for virtual reality development in the form of Metal 2. Valve and Apple will be bringing SteamVR and HTC Vive headsets to Macs—both new, state-of-the-art machines, as well as older ones that you might not think would be capable of running VR apps.
The newer Mac computers Apple unveiled during WWDC will have the horsepower to run SteamVR games. "Vive represents the best VR experience in the market and Apple is validating that by demoing Vive on stage for developers and content creators who are making the future experiences that will drive the Virtual Reality industry for years to come," a representative from HTC told Shacknews via email.
Along with SteamVR, the Unity and Unreal game engines will arrive on Macs and integrate into Metal 2. For older machines, a GPU enclosure touting an AMD Radeon RX 580 GPU can be connected using Thunderbolt 3. Apple did not announce a price or expected release date.
David Craddock posted a new article, WWDC: Apple's Metal 2 Adds VR Support, Coming in MacOS High Sierra
Unity already exists on Macs. It's the VR support that's new.