Apple released macOS High Sierra on Monday, September 25. The main features include HEVC(H.265) support, Siri Updates, Apple File System, Metal 2, VR and Extern GPU support, Anti tracking in Safari and Autoplay blocking in Safari.
Apple introduced macOS High Sierra at Worldwide Developers Conference in June 2017. Just 2 days after releasing macOS High Sierra first beta of this upcoming High Sierra update to developers. The first macOS High Sierra 10.13.1 beta can be downloaded from Apple Developer Center or if you have a proper installed profile then you can download it from Mac App Store.
Apple has not yet released any information about the improvements that are intended to achieve through this beta update but we are sure that it will include some bug fixes and bring some improvements to the performance issues.
Some of the features that were intended to be included in macOS High Sierra were delayed. Most probably these features which include iCloud storage for iMessages and new emojis will also be part of this beta update.