Mojave, the next major update for MacOS, will include plug-and-play support for HTC Vive Pro, a collaboration between Apple, HTC and Steam.
Current Mac systems lack the power for VR functions — even the most powerful iMac currently available needs an external GPU to power a VR headset — but Apple has revealed that it intends to upgrade the graphics cards in its high-end Macs, including the iMac and Mac Pro, to allow them to function as a VR gaming platform.