Apple released the second beta of macOS Sierra 1.12.1 with build number 16B2333a to register developers for testing. Now everyone can get hands on macOS Sierra 10.12 who have compatible macOS Sierra Macs.
No features or major changelog are expected in this version of macOS Sierra. The macOS Sierra 10.12.1 beta 2 update under the hood improves the stability, compatibility, and security of your Mac. macOS Sierra is a significant update that brings features like Siri support, a new storage optimization option, cross device copy paste, auto unlocking with the Apple Watch, and more.
User who enrolls Apple beta programs can download this second beta of macOS Sierra 10.12.1 through Software Update mechanism of App Store for those who already installed previous beta of macOS Sierra or via developer center website for developers only or Apple beta testing website for beta tester only..
List of all the previous macOS Sierra releases:
- macOS Sierra 10.12.1 beta 1
- Apple Officially released macOS Sierra 10.12 Final Version
- macOS Sierra GM version
- Apple macOS Sierra 10.12 beta 8
- Apple macOS Sierra 10.12 beta 7
- Apple macOS Sierra 10.12 beta 6
- Apple macOS Sierra 10.12 beta 5
- Apple macOS Sierra 10.12 beta 4
- Apple macOS Sierra 10.12 beta 3
- Apple macOS Sierra 10.12 beta
Above links are useful if you want to know macOS build specific features and bug fixes by Apple.