Apple has announced that macOS Sierra will be released to customers on September 20, as part of its media event currently going on. The update is (naturally) free and incorporates several new features, like Siri for Mac, Apple Pay for websites and more.
Owners of compatible Macs can upgrade for free by checking Software Update when the new OS is available.
For those completely out the loop, macOS is Apple’s new branding for OS X, Apple’s desktop and laptop operating system. This brings the Mac in line with Apple’s other platforms, that use the lowercase nomenclature like iOS 10, tvOS or watchOS. The new name is interesting but does not signify major changes to the platform with Sierra being a largely-incremental release with a few headline additions like Siri.