Mac owners can now stream and play Xbox One games directly to their computers using the OneCast app — a feature only natively available for Windows 10 users. The app is available for a 14-day free trial after which it costs US$11.79 (till April 1) for a standalone license.
https://www.notebookcheck.net/OneCast-enables-Macs-to-join-in-for-some-Xbox-One-fun.287328.0.html