I've played it without issue on Linux, not sure about Mac compatibility. I think it presents as windows exclusive, but using proton it seemed to behave when I tested under a fairly modern version of Linux. I'm still waiting for my new SSD in the mail before I do more experimentations with Linux gaming, but my experience through the steam deck has been very good.

I installed Starcraft / Starcraft 2 onto my M2 mac last night... once I'm done with Age of Mythology in totality (the campaigns, that is) I'm definitely gonna give them a go (on that platform)