Hi all - I have been a Windows user forever (mostly because of work) and my brother just passed away (way too soon) and I inherited his Mac Mini (model year 2009). I know nothing about Mac's and it's like a foreign world to me. I can bumble my way around a little bit but it's so difficult for me to find things and change settings. So, my current problem is that I can use the Facetime application but I have tried several webcams and NONE of them will let the other party hear me. We can see each other and I can hear the other party, but they can't hear me. The latest webcam I bought is the Logitech C615 which included the Mac software, so I thought ok, of course this is going to work, but NOPE, nobody can hear me on Facetime. I have used the Logitech software to record a video and in playback, there is audio, so there is nothing wrong with the mic. Do I need to buy a separate microphone for people to hear me on Facetime?? My 2nd problem or question is, the computer is currently running Mac OS X 10.7.4. Should I upgrade to Mac OS X Lion? I don't know if that will help with the Facetime problem? Otherwise, are there advantages/disadvantages to upgrading? Thank you for any advice you can provide. I am totally lost here.