Crusader Kings III won’t open [MacOS]

kskywalker said: I don’t have the ck3.app from the Finder.

It is certainly there. Right click on this game in your Steam Library, manage, browse local files. You'll see a folder /binaries/ ; go into that and double click on ck3.app then tell us here exactly what happens.

Please attach here your Documents/Paradox Interactive/CK3/pdx_settings.txt .
From your Documents/Paradox Interactive/CK3/logs/ folder, attach here system.log , error.log , exceptions.log

Also in Steam please click on Steam-Help-System Info, and paste everything there into a text file and attach that here.  

Driver: Intel Iris Plus Graphics

If your model of Mac only has an Intel video system, that is probably the cause of your problem. This game now only uses Vulkan as a renderer, not openGL any longer. And Vulkan does not run well or in some cases at all on Intel video Macs. FYI this game has never been supported on that hardware platform since release, so really it's a matter of luck that it ever worked!

All you can do is revert to the previous game version in the Steam betas tab for the game. Or play on any other machine you have access to with supported hardware. OR if you have Apple Bootcamp installed, play in Windows there.

Otherwise if you have just bought the game, please seek a refund from that store.

Sorry for the bad news!