Now you can play on Mac!
But it will not work on macOS 10.15 and later.
Mac version out now! (It will not work on macOS 10.15 and later.)
Source: Steam Community (opens in a new tab)
Build and release context
Steam update times within 24 hours of this post. Matching dates do not confirm which build it describes.
Build 11422600 · public branch
Steam updated · First observed