Unfortunately we don't have a Mac full release date yet. In the Community Update that announced the brought-forward PC date, Salo said:

Originally Posted by Salo
The full Mac version will also be released at a later date, and we’ll update you as soon as we have a target.

"You may call it 'nonsense' if you like, but I've heard nonsense, compared with which that would be as sensible as a dictionary!"