Dunno why, but my Blender Version 2.93.4 keeps shutting down for no good reason. It’s been like this for a while now
It would be helpful if you could provide some more details, such as your system specs and macOS version. It could also be caused by a conflicting add-on. Did you try File menu ➔ Defaults ➔ Factory Settings, or does Blender already crash during startup? In that case, have you tried a fresh installation?