I've got my headphone on and my computer started ringing. Shortly followed by my iPhone. They both stopped at the same time. I just had a friend call me and it didn't do it. He called me first with my Google Voice number and then my regular number. Neither made my computer ring. The one that did ring was an unknown caller from another state. So it was not facetime either. I don't have skype or anything like that installed on my machine. So does Mavericks have some kind of ringing support for iPhones now? If so, where? Also if so, why didn't it work when my friend called me? If not, what just happened?