Apple has introduced a sixth beta version of iOS 10.2, and fifth beta of macOS 10.12.2 Sierra to developers and public beta tester. A fourth watchOS 3.1.1 developer beta has also been seeded.
All of the updates include unspecified bug fixes and performance improvements. Developers can download the beta through the Apple Developer Center or the Software Update mechanism in the App Store. If you're not already signed up for the public beta program, you can do sign up here. The public beta program is free, but remember: beta software is unfinished software so use with care.