Apple today again pushed the MacOS Sierra 10.12.1 beta version to developers and beta users, the 4th of the MacOS Sierra 10.12.1. The update was 1 weeks after Apple pushed Beta 3, 3 weeks after the official release of MacOS Sierra.
If you are interested in the latest beta and have previously installed the beta version of 10.12.1, you can update it via the Mac app Store, or you can download it via the Apple Developer Center page.
MacOS Sierra 10.12.1 focuses on fixing bugs and improving system performance stability, and some of the new features are rumored to be for the next-generation MacBook Pro, which means that the upcoming MacBook Pro can be shipped with MacOS Sierra 10.12.1 System. It's worth mentioning that the previous 3 beta releases also found that photo apps now support the IPhone 7 Plus exclusive Feature-portrait mode that IOS 10.1 launches.
In addition, the Beta 3 version of the IOS 10.1 has also been pushed to test users, who can also be upgraded to the latest beta version.