FaceTime can't see Macbook Pro's onboard webcam after upgrade to Mavericks
Mid 2009 Macbook Pro just upgraded to Mavericks from Mountain Lion. Everything was looking good until I launched FaceTime, which gives the error message, "No Camera Available. To use FaceTime, connect a camera." I have a clone of the previous Mountain Lion system, taken just before the upgrade, so I can revert if necessary.