Hi, The Handoff feature of Yosemite works very will with my Mac, iPhone and iPad. The only issue I'm having is that when I make a phone call over my iMac the other person can't hear me. I can, however, hear him. When I do the same thing over my Macbook Retina it is working fine. So it seems that only my iMac has this kind of issue that the other person can't hear me. Does anybody have a solution to this?