The last AMA answered this question! Hope this helps:
This was their answer to that question:
Um let’s see here uh there have been discussions very early on around studio for the Mac but I think that really kind of ties into you know RecRoom on the Mac um I don’t know that it makes sense to release Studio on the Mac before rec room is available on the Mac and I don’t think we have any plans for RecRoom to be on the Macintosh yet so I would say um no right now there’s no plans for Studio to be available for anything other than Windows PC