Hey there,
So I successfully updated the MAC build to current version but to the point of previous Mac build, what I mean, it's still might need starting from MAC terminal. BUT! I did get some help directly from GameMakerStudio2 Developer and some pointers regarding that. I will need to spent some more time on it, figure out what's wrong and maybe then we will finally have a full and working for everyone mac build.
Look out at patch notes for updates.
Alex