When using groups in the Address Book, you may want to see which contacts are not assigned to any of your groups. This is a pretty convoluted method but until Apple provide a smart group option in Address Book to accommodate this requirement, you can do the following:
- Backup your Address Book by selecting File then Backup Address Book
- Create a new group and call it anything you like (I suggest “Z”)
- Select all of your contacts and drag them in to this new group
- Click on your first existing group (let’s pretend it is called Group1) and select all of its contacts (Command-a)
- Click on the Z group and you will notice that only the contacts you have just selected are highlighted
- Press Tab once to switch focus to the Name column
- Hit the Delete key and then click the Remove From Group button
At this point, you have a group called Z which contains all your contacts except those listed in Group1. Repeat steps 4 thru 7 for all your remaining groups and you will end up with group Z containing only those contacts not assigned to any other groups.