MacOS Sierra has been officially available for just over 24 hours, after its launch on September 20, and the Cupertino-based company is already working on the first updates. Most likely, this launch was already scheduled since it does not make sense to start launching betas of the first updates if the operating system has a security or operational problem, one day after its official launch. And I say that it was programmed because it has not been the only operating system of the Cupertino-based company that has received the first beta of its first update, since both iOS 10 and watchOS 3 and tvOS have also received their corresponding update, all for developers only.
Apple has released the first beta of the first update of macOS Sierra, 10.12.1 along with the first beta also of the first update of Xcode 8, software necessary to create applications for the different Apple operating systems such as iOS 10, macOS Sierra , tvOS 10 and watchOS 3. According to the notes of this first update, still in beta, macOS Sierra has the number 16B2327e while the beta of Xcode is number 8T29o. As for what's new in macOS Sierra 10.12.1 Apple has not added any significant changes and has focused on improving the stability, compatibility and security of our Mac.
These are practically the same "news" that watchOS 3 and tvOS 10 have received. However, the first beta-based update for iOS 10 is still in beta. the new function of the iPhone 7 Plus that allows blur the background of the photographs, as announced by Apple in the last keynote on September 7. But it also focuses on improving the operation and performance of devices that have already been updated to this latest version, as well as allowing developers access to barometric pressure data from the iPad Air 2, iPad Mini 4 and iPad Pro.