But that is my experience, I can only explain my problems in that case. Logitech tells you it is compatible with a MAC, but in reality it is not. this camera has problems with the microphone port and skype all versions since 2012 (at the moment version 6.5.0.433), this issue is not yet solved, but the camera seems to be responsible for loosing the microphone port (Skype-partner does not hear anything). New informations for Logitech C270, my experience is updated 06-21-2013: After the wake-up I have to change the input port in preferences - audio to another port and then back again, then it is working correctly in addition with reconnecting the camera again. The no more working microphone has to do with the sleep mode and the wake up-process. the Logitech-support (very friendly and helpful guys) told me also that a functionality over an usb-hub is not guaranteed (out of specifications) the power consumption of a C270-webcam can be up to 500 mA, and that means the whole power of this USB-port is used (information from Logitech-support Germany) also take a single usb-port (normally the usb-ports are organized in pairs) and leave the other port disconnected, because. my webcam C270 was connected over a usb-hub with the MAC, a direct connection solved the sound/video-problems with Skype and Photo Booth Sometimes no video, but generally no microphone input of the C270-webcam when trying to communicate with Skype. Hi, had a very similar problem with ML 10.8.3, Skype Version 6.

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Logitech c270 microphone not working