Apple today released the
Fourth Beta of
macOS Sierra, the newest operating system designed for the Mac, to developers.
macOS Sierra Beta 4 comes two weeks after the
release of the third beta and almost two months after the software was first unveiled at Apple's
2016 Worldwide Developers Conference.
Developers can download today's
Beta update through the software update mechanism in the
Mac App Store or through the
Apple Developer Center.

macOS
Sierra is a significant update bringing
Siri to the Mac for the first time, allowing users to conduct voice searches to quickly find files, look up information, and more. New Continuity features offer an "Auto Unlock" option for unlocking a Mac with an
Apple Watch and a Universal Clipboard for copying something on one
Apple device and pasting it on a**ther.
Deeper
iCloud integration makes files stored on the desktop or the Documents folder of a Mac available on all of a user's devices, and Photos features deep learning algorithms for improved facial, object, and scene recognition. There's a Memories feature for displaying photo collections, and Messages has rich links, bigger emoji, and "Tapback" response options.
Apple Pay is coming to the web in
macOS Sierra, with payments authenticated through an iPhone or
Apple Watch, and new features like multiple tabs, Picture in Picture multitasking, and optimized storage are also available.
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During the
Beta testing period,
Apple will tweak and refine the features introduced in
macOS Sierra. Any changes found in the
Fourth Beta release will be listed below.
macOS
Sierra is currently available to
Developers and public
Beta testers, and it will see a wider public release this fall. For full details on all of the new features included in
macOS Sierra,
make sure to check out our macOS Sierra roundup.
Related Roundup:
macOS Sierra
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