Apologies if there is an answer here that I can find. I recently resurrected a mid 2010 Mac mini and drop kicked my Win7 Desktop. Now once again hooked on MacOS. I am trying to use a Logitech Webcam Pro 9000 that worked flawlessly on my OC and from what I can see it ought to work on the mac mini BUT it doesnt. The cam works OK but the mic doesnt. The only tip I have seen is to go to the MIDI utility in system settings - which I tried but it didnt seem to work. THe mic was not muted as I have seen in some posts. Any tips? BTW a testament to Apple HW - I upgraded to Yosemite because all of my software required it. With 4GB of memory I was ready to buy a new computer but upgraded to 8GB and it is working like a champ. Many thanks for any help.