The fourth beta of macOS Sierra 10.12.2 has now been seeded to developers. We find this update two weeks after the last build. The only thing that we’re sure of in this version is new emojis. Other than that we’re not sure what’s new. Likely some bug fixes and other improvements.
To get this version, developers can go to the Mac App Store and find it there. If you don’t have macOS 10.12.2 yet you can go to the Apple Developer Center and download it there.