Just about 24 hours after releasing macOS Sierra 10.12.2 beta 2 to developers, Apple has now pushed the software to public testers as well. Members of the public beta program can update to beta 2 directly from the Mac App Store.
macOS Sierra 10.12.2 doesn’t seem to offer many new user-facing features besides a myriad of new emojis that are part of unicode 9. Other improvements are apparently under the hood, likely offering bug fixes and stability improvements.