I decided to buy the Logitech C930e because it currently is probably the best webcam for MAC products on the market. The webcam has been connected and downloaded the authorization provided by app store "Logitech Webcam Settings". Now one must first know that it is therefore not done because one gets from its MAC no news that a new product (Webcam) is detected and additional drivers are not available. The trick is (took me two hours of my life) that one first preserves the nerves, so do as you would want to shoot a new video on QuickTime, eventually driving the right of the red dot the little arrow (triangle) to finally in the selection selects the Logitech Webcam (once for picture and one for sound). It läüft all Top!