My friend just bought a Mac Pro and now has issues getting a simple headset to work with it. It seems like the line in does not amplify the signal so whatever he speaks into his microphone is too faint to be recorded. Now I wonder if he does something wrong or if it is really true that a $3000 Mac has no support for a 3.5mm mic in which is available on even the cheapest PC and also on my MacBook Pro. I am not talking about any fancy stuff like phantom power or so, just a plain simple 3.5mm microphone that works everywhere else. Any insights in how to get this to would be greatly appreciated.