Calendar not responding

Thanks for replying, brianh107, and that additional info, it really helps!

Since you're still having this issue in your user account but not in a new user account, it appears that the issue is user specific. Depending on exactly what you are seeing in Calendar, you may find some of the troubleshooting listed in the following article helpful. Also, if you have your calendar data backed up or maintained on a server, you may want to try removing the Calendar settings/accounts in your user account, closing Calendar, restarting your Mac, then setting your calendars up again in your user, just as if you were setting up a new user.

Troubleshoot Calendar problems on Mac - Apple Support

Have a great day and thanks for using the Apple Support Communities!

Hello brianh107,

Thanks for that info and for choosing the Apple Support Communities. If I understand correctly, you are having an issue with the Calendar app on your MacBook Air, but you don't have this issue with your iPhone or in a new user account on your Mac. First, try running First Aid on your hard drive with the built in Disk Utility tool, as this can correct issues like you're experiencing.

Disk Utility for Mac: Repair a disk using Disk Utility

Next, use safe mode to start up your Mac as it does the following things:

• Verifies your startup disk and attempts to repair directory issues, if needed
• Loads only required kernel extensions
• Prevents Startup Items and Login Items from opening automatically
• Disables user-installed fonts
• Deletes font caches, kernel cache, and other system cache files

Log in to your user account and test the issue while in safe mode and then restart normally and test the issue again.

Use safe mode to isolate issues with your Mac

Graphics performance limited in macOS Recovery, safe mode, or Guest User mode

Cheers!