[2021] It won't load [Mac] . . .

Do you see the Paradox launcher? Or does it never show up either?

If the Paradox Launcher doesn't show up or gives you errors, please try the steps here:
https://steamcommunity.com/app/255710/discussions/0/1742265315844206043/

If that doesn't work, please follow the instructions at the end to contact Paradox Support.

If you make it all the way into the game before having problems, then please make a thread on the official support forums with as much detail as you can. Include things like how far you get, if it crashes, if you get any errors, what happened just before the crash, etc.

https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/