Send and receive vCards in Mail on Mac
You can exchange electronic business cards, called vCards, with other people.
In the Mail app on your Mac, start a new message.
From the Contacts app on your Mac, drag your card or another person’s card to your message in Mail.
The vCard is attached in .vcf format to your message.
Tip: If you often send your vCard to people, include the information as a signature instead.
In the Mail app on your Mac, show a message with an attached vCard.
Double-click the vCard to add it to the Contacts app on your Mac
Contacts opens and displays the new card.