Shortly a public beta was released on July 7, 2016. The first-ever beta version of the macOS Sierra was released for developers on June 13 2016, after the announcement being made on WWDC in 2016. Those issues ware destroying Apple’s image in the market, after the arrival of macOS Sierra 10.12 not only this issue was fixed but even Major features like iCloud, Apple Pay, and Siri were introduced to delight users even more. However, now the GUI has been improved drastically.
This version has also affected the macOS series, as before macOS Sierra all older versions were having issues with graphical user interface. This is the successor of macOS El Capitan and was succeeded by High Sierra. macOS Sierra was the first version of the operating system issued and rebranded as macOS by Apple. It was named after the Sierra Nevada Mountain in California, USA. Then it was changed to OS X and from 2016 it is called only macOS. Still, there are using terms like “ macOS 10.12 download” as it was called Mac OS X in the past. MacOS 10.12 is the thirteenth major release of macOS by Apple.