Apple is continuing to blend — though not merge or unify — some of the best features of iOS 7 and iOS 8 into the latest OS X 10.10 desktop operating system. Apple calls one of those features Continuity; it allows iPhones and iPads to talk better with Macs.
You can now make phone calls and other voice and video calls from your desktop. Apple is touting a new feature that, so long as your phone is within range and near-proximity, you can pick up phone calls from your desktop or notebook. It's not yet finished, but it worked remarkably well with FaceTime calls.
Also, if you are in an area where there is no wi-fi, your iPhone (running iOS 8) will become an instant personal hotspot and connect your Mac to the Web. And when you no longer need it, the connection will cut out so it saves on your data plan — as well as your iPhone battery.
The new Safari comes with a similar translucent new user interface, with many of the features packed in from OS X 10.9 "Mavericks." It also comes with an omnibar, which allows users to search and type in websites, as well as access your recently-most visited sites and other favorites and bookmarks.