Delete or remove calendars on Mac
You can delete calendars or temporarily stop using calendar accounts.
Stop using a calendar account
You can temporarily stop using an account so that its calendars and events no longer appear in Calendar on your Mac.
Go to the Calendar app
on your Mac.
Choose Calendar > Accounts, then select the account you want to stop using.
Deselect the Calendar checkbox.
To use the account again in Calendar, select the Calendar checkbox. The account’s calendars and events reappear.
Delete a calendar account
If you no longer want to use an account in any app, including Calendar, you can delete the account.
Note: If you use iCloud Keychain, and you remove an account (other than iCloud from your Apple Account), you’re asked whether to remove the account from your other Mac computers that use iCloud Keychain, or just turn off all the account features on this Mac.
Go to the Calendar app
Choose Calendar > Accounts, then select the account you want to delete.
Click
at the bottom of the account list.
Delete a calendar
Go to the Calendar app
Click the calendar’s name in the calendar list.
If you don’t see the calendar list on the left, choose View > Show Calendar List.
Choose Edit > Delete.
Some calendars can’t be deleted.
You can’t delete delegated calendars, but you can stop showing them in the main Calendar window. See Manage shared calendars.
If you can’t delete a calendar for a particular calendar account, try deleting the calendar on the account provider’s website. For example, to delete a Google calendar, go to google.com.
If a calendar account has only one calendar (not counting other people’s calendars you’re sharing), you can’t delete that last calendar.