Experimental mac build is out now folks. I don't have a mac so I can't test it myself but I should hopefully be getting feedback from some mac users soon.
It was updated on itch.io, you have to redownload it one itch to get the new update. The steam early access release is just around the corner though, I'm just waiting for Valve's approval then the Steam page will be up and release will come 2 weeks after that.