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Invite contacts to Calendar events on Mac
If you use the macOS Calendar app, you can create a calendar event for a specific contact, or for a list.
In the Contacts app
on your Mac, select one or more contacts or lists.
Open Calendar, then drag the contacts or lists you selected in Contacts to a date in the Calendar window.
Make any adjustments to your event, then click Send.
To add more contacts to an existing event in Calendar, double-click the event, then drag the contacts to the event. See Add, modify, or delete events in Calendar.