You can choose whether others can edit the calendar account or only view it.

Enter the name of the person you want to give access to, then choose his or her name from the list that appears.

If youre giving access to a CalDAV account, select the Allow Write checkbox to let the person edit your calendars.

If youre giving access to an Exchange account, select the persons level of access from the Calendars column.

See calendar accounts you have access to In the Calendar app on your Mac, choose Calendar Preferences, then click Accounts.

For an Exchange account, click Add button, then enter the user name of the person who gave you access.

To see a delegated accounts calendars in the main Calendar window, select Show.

To see a delegated accounts calendars in a new window, choose Window account name.

Make events private If you have a shared calendar account, you can make private events that cant be viewed by others.

If there is no Private checkbox, the event either has invitees or isnt administered through a CalDAV or Exchange server.

Instead of sharing your entire account, you can share individual calendars.

See also Ways to share calendars on Mac Publish or unpublish calendars on Mac Share iCloud calendars on Mac Subscribe to calendars on Mac.

Sharing Your Calendar In Outlook For Mac