Spark for iOS and Mac supports contact groups created in the Contacts app on your Mac or on the iCloud webpage. Groups such as “Family” or “Football team” are a great way to organize your contacts and email them all at once.
Just start typing a group name in the “To:” field, select a group from the list, and Spark adds the email addresses of all group members.
To use groups of contacts in Spark, please make sure the app has access to your contacts:
There are two ways to create a group of contacts you can use in Spark:
Please check the instruction from Apple for more details.
Note: To access a contact group on all your Apple devices, please add this group to the iCloud section on the sidebar (not On My Mac).
Check the article from Apple for more details.
After creating a new group, restart Spark to update your contacts.Read next: Automatically Cc or Bcc emails