Does Ostranauts run on Mac?

Yes — Ostranauts is playable on Mac.

Ostranauts is graded playable on Apple Silicon from community reports and how the game is built. It hasn't been hand-verified on our own Macs yet, so expect an occasional rough edge — and tell us how your run goes. You need to own Ostranauts on Steam; Pixel Port runs the copy Steam delivers.