Q: How can I turn the camera on my MacBook off?

Kerr255 wrote: ... How can I turn it off?

Quit all apps that are using the camera:

OS X Mavericks: Use your Mac computer’s built-in camera.

If you have hidden any Login items, 

you should still be able to see if they are working in Activity Monitor.

If you are still having trouble, see Isolating issues in Mac OS X

and/or How to Troubleshoot iSight.

Message was edited by: EZ Jim

Mac OSX 10.9