When Apple released OS X Mountain Lion, it included some extra controls to help you keep personal information private. One area of personal information you now have control over is your Contact list. Prior to OS X 10.8, apps could access your Address Book (the name changed to Contacts with Mountain Lion) without alerting you, or requesting your permission.
When you run an app on OS X Mountain Lion for the first time, and it tries to access your Contacts, you'll see an alert similar to that above. Clicking OK will allow the app to access your Contacts, … Read more