Since no system is perfect in its entirety, certain types of mishaps always occur to us. we do not understand why they suddenly occurThis is an example of one of them and that is that the camera integrated in the equipment may stop working without prior notice.
The clearest symptom appears when checking that when opening applications such as PhotoBooth, FaceTime or any other program that makes use of the camera, it shows us an error message telling us that the camera is not connected.
How to activate the Mac camera?
If the problem is derived from the system software, we will only have to close the process involved in the camera administration to run it again, in this case it is VDCAssistant.
To activate the Mac camera we will have the possibility of proceeding in two different ways, one of them it's through the terminal in Utilities> Terminal and entering the following command to 'kill' the process:
sudo killall VDCassistant
We can also do it through the Activity Monitor on the same route Utilities> Activity Monitor and in the tab of all processes, end it although to get to this point we have to previously mark 'All processes' in the View menu.
This can also be applied to cameras connected via USB although it is not too much check that the manufacturer's drivers are working properly by reinstalling them as a preventive measure. However, if the problem has come as a result of a change of equipment, check if there is a firmware update for the camera in question.
Anyway most of the time it's a merely anecdotal problem and timely that it is solved by disconnecting and reconnecting the camera or restarting the Mac. What is striking is that after so long, this failure continues to occur today in which the Mac sometimes does not detect your webcam, even on the latest versions of the system.
It is clear that it is not among Apple's priorities to solve the failure that no camera connected to Mac.
More information - Reset the audio system in OS X