Issue with iSight on MacBook updated to 10.11 El Capitan I updated my MacBook Pro (15-inch, Mid 2009) to OS X 10.11 El Capitan.  Then I found that the built-in iSight camera wouldn't work in any application I tried.  What can I do to resolve this?
Turn off the computer. Press shift, control, option, and the power button at the same time for 15 seconds. Then turn on your computer. This resets the hardware.