Apple has released an updated version of macOS High Sierra 10.13.6 designed for the 2018 MacBook Pro models, while we await the launch of macOS Mojave this autumn.
The new version of the software can be downloaded directly from the Mac App Store or through the Software Update function in the Mac App Store on all compatible Macs that are already running macOS High Sierra. For more details click on the full article.
https://www.macrumors.com/2018/08/28/macos-high-sierra-update-2018-macbook-pro/