Hi all,
It looks like more users are having this problem.
I did not solve this in the meantime. Unfortunately..
SimCity already crashes while loading the city.
However, there was a small time in between posting the problem and answering you guys that i wás able to play.
I don't know what made the difference, apart from the settings of the resolution: you can see in the screenshot that i changed the format of the window game.
This helped for a while, but not anymore..
But: i do not need a hard reset. I installed "clean my mac" and it detects apps that are frozen. That way i can "force quit" anything without resetting.
Maybe that will help someone to figure out what is crashing (to be able to take a look "inside" the game because the computer still works properly).
Keep me posted please!