Question: how do you send a calendar invite on a mac?
Answer: In the Calendar app on your Mac, double-click or force click the event, then click Add Invitees or click next to any existing invitees. ... 
Enter each invitee's name or email address, then press Return. ... 
If you see Check Availability below the last invitee, you can click it to see when invitees are free or busy. ... 
Click Send.