The Apple file system is the most significant feature it brought.
There are few bells and whistles, but the changes are noticeable and positive. High Sierra emphasizes the already-existing benefits of MacOS previous system, Sierra. In essence, High Sierra took what was good with Sierra and developed it into a more comprehensive software. Since October 10, 2017, Office for Mac 2011. Word, Excel, PowerPoint, Outlook, and Lync have not been tested on macOS 10.13 High Sierra, and no formal support for this configuration will be provided.