Apple released the first beta for developers macOS High Sierra 10.13.1 two days after the official release.
The beta version can be downloaded from Apple’s developer Center or via the Mac App Store, if you have a special profile. While it is unknown what changes brought the first update. Likely, Apple has improved performance and fixed bugs.
macOS High Sierra was presented at the conference for developers WWDC. The final version was released on September 25. One of the main changes was the transfer of the file system, Apple File System (APFS), which is used in iOS. macOS High Sierra available on all Macs that support macOS Sierra.