Rhino 5.5 crashes when trying to open any project

Rhino crashes. I don`t know why… How to fix it?

Hi Anastasiia -
Could you please provide more information?
Does Rhino crash when you start with a new file?
Does it crash when you import a file instead of opening it?
Can you post a file that causes a crash?
Which version of macOS are you running?
-wim