Apple announced macOS Sierra back in June at its developer conference, and after a beta testing period that went on for the past few months, the new software is finally ready for the general public. The company has made the release available today, as a free upgrade to Mac users. macOS Sierra (version 10.12 if you're keeping track) can be grabbed through the Mac App Store, and it's going to be a 4.77GB download - so make sure you get it on a decent internet connection. While this isn't a big update by any stretch of the imagination, it still comes with many new features. For example,...
Source: http://www.gsmarena.com/apple_makes_macos_sierra_available_for_download_as_a_free_update-news-20616.php