Facetime does not work on my Macbook Air - preferences are grayed out. What is wrong?
I have got a reasonably new Macbook Air, and I wanted to start using FaceTime and Photo Booth. Neither recognises the built-in camera. I have spent some time going through FaceTime troubleshooting support. Support suggests that I sign in for FaceTime, but it does not say where (I don't get prompted either). Equally, support suggests that I go to FaceTime / Preferences - however, that is grayed out. What is wrong? M.
MacBook Air (13-inch, Mid 2012), OS X Mountain Lion (10.8.3)