If your model of Mac only has an Intel video system, that is probably the cause of your problem. This game now only usesw 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!
If that is the situation you can try updating MacOS to 14.x which may have a newer Intel video driver; if that doesn't help or is not possible, all you can do is revert to the previous game version 1.10.2 in the Steam betas tab for the game. Or play on any other machine you have access to with supported hardware.
If however that is not the case - ie that your Mac has AMD video - that's a different matter; let us know here and we'll look into your case more closely.
