The feature lets you dial out as well, say, by clicking a number that's stored in your address book, calendar, messaging app, or Safari browser - a restaurant or store's phone number, for instance. So long as your iPhone and Mac with OS X Yosemite share a Wi-Fi network, you'll be able to take calls on your computer that come to your phone - you can mute audio, and also switch to video mode.
True, Apple is years behind Google when it comes to making and taking phone calls from the computer, but its better-late-than-never approach gives the company two big advantages over Google's system: the fact that it easily syncs with your phone, and that it's part of a tightly-integrated system that goes beyond making calls. If you own an iPhone and a Mac, Apple's new system for connecting the two is one of the best new features for OS X 10.10 Yosemite. OS X Yosemite will let you field iPhone calls from your Mac.
