I was able to run the game fine on mac, by opening it though browsing game files. I have played over 45 hours. The mac used to be listed as platform in the steam store. Now it is gone, and because my game did not update and I was not aware of the platform being removed I deleted it and tried to reinstall. This was an unpleasant surprise as now I cannot download of play the game anymore. Why remove mac as platform if it worked fine?