Are you trying to upgrade your Mac from Sierra to High Sierra, the full installer of High Sierra can only be downloaded via the App Store, follow the link here,
https://support.apple.com/en-us/HT208969, scroll down to part 4 where there is a further link that will take you to the App Store where you can download the OS. This will install the latest/ last version of High Sierra 10.13.6
It sounds like you were trying to install an update to High Sierra, possibly the Combo 10.13.6 from the Apple Support Downloads page, you must have an existing copy of High Sierra to do that as that is termed an update. Going from one OS to another, newer OS is called an upgrade and can only be done through the App Store.
Download Macos Sierra 10.12.0
![Download Download](/uploads/1/1/7/8/117803291/579050445.png)
Download Macos Sierra 10.12.1 Update
Dec 10, 2018 7:02 PM
Download Mac Os Sierra 10.13 Iso
In this article, I am going to give you the direct link to Download macOS High Sierra ISO DMG VMDK File – All In One. Whenever you want to install macOS High Sierra on virtual machines like VMware and VirtualBox then obviously you will be in need of ISO file in order to have a clean installation of macOS High Sierra. If you looking on the internet a MacOS High Sierra DMG So, you come to the right place now a day shares with you a Mac OS High Sierra 10.13.6 direct download without an app store. MacOS High Sierra v10.13.6 Review. A powerful Mac OS X release, High Sierra 10.13.6 provides a wide range of security and other enhancements that enhance the user.