I just got my 21.5 inch iMac yesterday, and I was so excited I video chatted with cousin about it. I plugged the microphone to the mic slot and well...it didn't seem to work. I already changed the audio in settings to line in instead of the internal speakers since they're so sensitive to noise, the same for skype, I changed it to input from line in, but I'm still not getting any sound from the mic. You may say it might be broken, but no. I plugged it back to my old Windows laptop and it was working fine. Could anyone help me with this? thanks!