macOS Calendar – Fix Calendar Reappearing After App Reset

How do you delete all calendars app data and reset the app information to default.

Issue:

• I delete all the calendar data and reboot the system. I open the calendar app and it has reset to the default calendars. But then it resets again and loads the previous calendars that I deleted. Not sure where it's finding it from since I thought I deleted all the locations the calendar app data resides.

Setup

• on macOS 10.14.6
• calendar Version 11.0 (2245.5.2)
• local sync only (no iCloud)

I have deleted the following:

• ~/Library/Calendar/
• ~/Library/Containers/com.apple.CalendarAgent
• ~/Library/Containers/com.apple.CalendarAgent.CalNCService
• ~/Library/Containers/com.apple.CalendarFileHandler
• ~/Library/Containers/com.apple.CalendarNotification.CalNCService
• ~/Library/Containers/com.apple.iCal.CalendarNC

Then I have rebooted the system.