[2023] Crash on Mac M1

It ought to run on an M1 Mac, even though strictly speaking that is not supported hardware for this game.

In fact that error looks like a Steam problem in some way:

steamloader.dylib' could not be loaded:

What happens if you run ck3.app directly from Finder? Same problem?  

Are you on a current Steam version? I've seen recently that you need to do a manual check for any available Steam updates, they don't always happen automatically any more.

And, you haven't opted into the Steam beta programme, have you?  

Looks like the same issue as here then:

New Mac OS (Sonoma) - launcher does not work.

Integrity I have verified my game files (on Steam) Yes I have disabled all mods Yes Required Summary New Mac OS (Sonoma) - launcher does not work. Description Hi! I have updated my MacOS to the newest version (Sonoma, 14.0) and paradox... forum.paradoxplaza.com
We'll need launcher developer support, so please post your log in that thread.

Sorry for this problem! A weird one.  

You see post #10 in that thread, from a developer? That's very similar to what you are seeing.