If you're using a Mac and want to upgrade to or download macOS High Sierra 10.13.6, you can do so directly from the Mac App Store. Here's how:
hdiutil detach /Volumes/Install\ macOS\ High\ Sierra hdiutil convert /tmp/HighSierra.cdr.dmg -format UDTO -o /tmp/HighSierra.iso 4. Alternative Direct Download Links (Third-Party) download macos high sierra 1013 6 dmg file link
