Calendar crashes on open: Apple Support Communities. Linc Davis has multipel fixes for a calendar that crashes when you open or start it. Excellent step by step.
Read this whole message before doing anything.
Back up all data.
Quit Calendar or iCal if it’s running.
Hold down the option key and select
Go ▹ Library
from the Finder menu bar. From the folder that opens, move the following item to the Desktop, leaving the window open:
Note: you’re not moving the Calendars application; you’re moving a folder named “Calendars”. Relaunch the application and test. If there’s no change, quit again and put the folder you moved back where it was, overwriting the one that may have been created in its place.
If the application launches after you move the Calendars folder, the event database is corrupt. You have two choices:
- Restore the folder from a Time Machine snapshot or other backup that predates the corruption.
- Use a third-party application such as Calendar Cleaner to try to repair the database.
If the application still crashes when you remove the database, then some other file is corrupt. Go to the next step.
Delete the following items from the Library folder (some may not exist):
- Saved Application State/com.apple.iCal.savedState
Try the application again. If it works now, stop here. Close the Library folder.
Move the following items from the Library folder to the Desktop (again, some may not exist):
Here “*” stands for a long string of letters, numbers, and dashes. Test again. If the application now works, you may be able to put back some of the files you moved in this step, relaunching and testing after each one. Eventually you may find the file that caused the problem; delete it. Recreate your settings if necessary. Close the Library folder.