Logitech does offer a free peice of software in the app store for free. 'Logitech Camera Settings'. Its for another cam I think, but some people have had success controlling the c920. If that doesn't work, the app, 'Webcam Settings' from the app store (formerly 'Mactaris' I think) will control a number of the features on the cam.

Plug it in. Provided you are using Mac OS X version later than 10.4.8, no other setup is required.

OS X versions later than 10.4.8 provides all the software your C920 needs for operation with Apple camera apps including those shown in OS X Mavericks: Use your Mac computer’s built-in camera.

Unless you are using your camera with Windows® OS, I suggest that you not install any Logitech software. The software that Logitech includes with the camera may offer additional features over Mac OS X alone, but some Mac OS X users find that the Logitech software conflicts with some of their system elements or other installed third-party software.

Logitech Options Software

Jan 5, 2014 8:59 AM