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Call someone on your Mac, via your iPhone
With Apple's new iPhone bridging feature, dubbed Continuity, you will be able to take and make calls on your Mac so long as your phone is nearby and connected to Wi-Fi. Despite occasional connectivity issues, and while this wasn't tested fully, the functionality exists — and aims to save time when your iPhone is on the other side of the office or your apartment.
See all your files in iCloud Drive
Long awaited and finally added into this software release, a new Finder sidebar option, iCloud Drive, is exactly what it appears to be. Many apps already store data in iCloud, which when it was first released was not an option. It was reserved for photos and contacts, and now and then email — if you ever used it. Data from apps is sandboxed and segregated into separate folders. Although the feature is a little less seamless on Windows, you can still export your data from non-Mac devices.
Image: ZDNet/CBS Interactive
Connect to the Internet, anywhere
Also, thanks to Continuity, another bright spark feature aims to allow your MacBook to switch between networks without a second thought.
When there are no Wi-Fi connections, so long as your iPhone is within reach and connected to cell service, your Mac will automatically connect to your iPhone as a personal hotspot. And when you're no longer active, it will switch off to save your device's battery.