Previous 1 2 3 Next 72 Replies Latest reply: May 17, 2013 6:20 PM by gary oldknow
davidnave Level 1 Level 1

I have only noticed this behavior when no users are logged in, and the computer is put to sleep by closing the clamshell. It also only appears to happen after an extended sleep, meaning 30 minutes or more. I open the clamshell, the backlight comes on, I see the login screen, then the screen flashes like when Photo Booth takes a picture, then the computer works normally. This is not a great concern, but it is unusual. It doesn't happen when a user is logged in. It doesn't happen during boot. I am running 10.8.2, and do have power nap enabled. I have noticed the behavior both when running on the power adapter and on the battery. No Accessibility functions enabled. Trying to isolate the issue, and reaching out for others with same behavior. Cheers.


MacBook Air, OS X Mountain Lion (10.8.2)
Reply by Jon P D on Sep 20, 2012 11:25 AM Helpful

the screen flashes like when Photo Booth takes a picture

Do you have any security software installed? Some have features that take a photo with the webcam when the lid is opened.

Reply by cosminium on Oct 23, 2012 1:33 PM Helpful

I was able to solve this by disabling "Show mirroring option in the menu bar when available" from System Preferences > Display

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