Apple has rolled out an updated beta version of macOS 10.12.2 for Mac. The new build comes in at version 16C32f compared to 16C32e from the first beta release and may require installing an update utility from the developer center. Note that the new build is not macOS 10.12.2 beta 2 as it still lists version 1.0 on the release, just a newer build for some reason.
macOS 10.12.2 includes Unicode 9.0 emoji support, which matches compatibility in beta versions of iOS 10.2 and watchOS 3.1.1.
macOS 10.12.2 will be released to everyone in the future, and the beta allows developers to test pre-release versions of the software update before it’s released.
macOS 10.12.2 follows the major release of macOS Sierra in September. Sierra includes new features like Siri on the Mac for the first time, Apple Pay on the web, picture-in-picture video playback, and much more.