Apple has today seeded the sixth beta of macOS Sierra 10.12.2 to developers. We get this update a few days after the last build. In this version of macOS we find new emojis as well as a bug fix for graphics issues on the new MacBook Pro. Other than that we’re not sure what’s new.
To get the latest beta developers can go to the Mac App Store and find it under the updates page. If you aren’t running the 10.12.2 beta, you can go to the Apple Developer Center and download the installer there.