Thanks for the clarification! I got worried about Steam telling that i can't play the game, but i do wonder why would steam tell me that it won't run with 10.15 or above even though the specs says I can play it? Usually when this happens, it's because steam thinks that the game runs on 32-bit and not 64-bit, could that be the issue and is there a way to change that?
OH, I finally see what's happening. I opened up the Steam page on my Mac 10.15 and I'm seeing that same odd notice about 10.15 or above, etc. This might have something to do with our settings for Mac build, we'll look into it and see if we can have that rectified (it should certainly be 64-bit, and be totally compatible!)
Thank you so much for drawing our attention to this!