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Apple today released the seventh beta of macOS Sierra, the newest operating system designed for the Mac, to developers and public beta testers.



From MacRumors:
macOS Sierra beta 7 comes one week after the release of the sixth beta and two months after the software was first unveiled at Apple's 2016 Worldwide Developers Conference.

Developers and public beta testers can download today's update through the Software Update mechanism in the Mac App Store. Developers can also download the beta from the Apple Developer Center.
  Apple Seeds Seventh Beta of macOS Sierra to Developers and Public Beta Testers