Get smart with contacts
Create groups that maintain themselves
1 Get started Ensure that the Groups sidebar is open (if it isn’t, choose View > Show Groups or press ç+1). You’ll see existing groups from your iCloud account, below which will be the Smart Groups section only if you’ve already defined a Smart Group.
2 Create a Smart Group Choose File > New Smart Group. In the sheet that appears, name the group, then use the controls below to select an attribute and specify a value, and how contacts must match the two in order to be included in the group.
3 Make complex matches Click the + to the right of the rule to add an extra criterion. On doing so, a new pop-up menu appears above the list of criteria. Use it to determine whether the Smart Group should match all or any (at least one) of your specified conditions.