How to set default web cam I have installed CamTwist on my MacBook (mid-2015 - Retina display).

Now every app uses that by default.

I want the default webcam to be the FaceTime HD camera installed in my MacBook.

How do I make every app use that webcam by default?
Looking at http://camtwiststudio.com/support/faq/ the following seems to apply to your situation. 



PS: Development for the application may have stopped, the web site looks rather outdated.