Preview at WWDC likely in June, followed by September launch.
Apple Seeds Fifth Beta of macOS Sierra to Developers [Update: PB4 Now Available for Public Beta Testers]
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 major update that brings 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 text on one Apple device and pasting it on another.
Deeper iCloud integration allows files stored on the desktop or the Documents folder of a Mac to be accessed on all of a user's devices, and Photos features deep learning algorithms for improved facial, object, and scene recognition. There's also 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, optimized storage, and revamped emoji are also available.
During the beta testing period, Apple tweaks and refine the features introduced in macOS Sierra to prepare it for public release. In macOS Sierra beta 4, Apple introduced new emoji promoting gender equality and introduced a new look for many existing emoji with new textures and design tweaks. Any changes found in the fifth beta 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.
Update: Apple has also seeded macOS Sierra public beta 4 to public beta testers. It is identical to the 5th developer beta.