If you receive the Sync Alert: "FirstEdge would like to sync Contacts with Address Book and other applications"

This is an alert from your Macintosh OS. If the Macintosh Synchronization Service has never been activated, the Macintosh OS will display the alert prompting you to register the service. Click Allow to start the synchronization process.

Note:  If you click the Reset Sync button, the relationship between Address Book and your Cards List is reestablished. You will receive the Sync Alert so that you can register the service again. Click Allow in the Sync Alert window to start the synchronization process.