With contact groups, you never have to manually add the same people to an email again and again. Grouping regularly used contacts can save you a lot of time in the future. How It Works on a Mac:
Creating a New Contact Group
Open the Contacts app on your Mac. You can find it in your Applications folder or search it with Spotlight.
Select the account (in the left sidebar) in which you want to create the group, and then click the + button. Then click on the "New Group" button.
Enter a name for the new group and press Enter.
Now you can add contacts to your new group.
Add contacts to a group
Find the contact you want to add to a group: scroll down the list of contacts or use the search bar. Drag the contact to the group to which you want to add it.
Repeat for all contacts you want to add to the group.
Remove contacts from a group
Click the group where you want to remove a contact, select the contact, and press the Backspace key. Click "Remove from group" to confirm the action.
Rename an Existing Group
You can rename a group after you create it. Select it and click the "Edit" menu on the taskbar. Select "Rename Group" and enter the new name.
Press Enter to save your changes.
Deleting a group
You can delete a contact group when you no longer need it. During this action, no contacts are deleted.
Select the group you want to delete and press the Backspace key. Confirm with "Delete".
Any changes you make on your Mac will sync to your other devices if you have them configured.
Send email to members of a contact group
You can send an email to all members of a contact group directly from the contact app.
Right-click the group to which you want to send an e-mail and click the "Send e-mail to" option.
A new e-mail is created with the group as the recipient.
Alternatively, you can create a new e-mail message in the Mail app and enter the name of the group in the Recipient field. Press Enter to add it. Right-click the group name and click Expand Group to confirm the members of the group.
. Send the e-mail as usual after you have written your message.