Except for Overwatch, RIP. Also Diablo 3 has always run terribly on MacOS. Pretty much only WoW runs decently. Maybe Starcraft 2 used to be okay but it since became way worse.
If they truly cared about the Mac, they would release Overwatch for macOS. It runs just fine on modern Macs via bootcamp.
Pretty strange considering the other (arguably more complicated) engines were supported from day 1, even their unreleased FPS (Ghost?) was going to be launched like that.