After I upgraded from OS X El Capitan to Sierra, whenever Parallels desktop starts, it disables built in camera on my MacBook Pro. After laptop boots, camera works with any application (photo booth, facetime, skype, vydio, etc), but as soon as I start Parallels, camera stops working (green light stops coming on). It happens without starting any virtual machines. I had Parallels 11, then I paid $49 and upgraded to 12 -- no difference. After I reboot, camera works as long as I do not start Parallels Desktop. My laptop is 2012 Retina MacBook Pro.

