Apple has just seeded the second beta of macOS Sierra 10.12.2 to public beta testers, approximately one week after releasing the first public beta of 10.12.2 and one day after seeding the second beta to developers. It’s also been more than two weeks since Apple released macOS Sierra 10.12.1 to the public.
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.
If you are signed up for the public beta program, and are already running the first public beta, the new public seed is available as an update through the Mac App Store. If you are not signed up yet, but want to be, you can do that right here.