Download Mac Os High Sierra 10.13.6 Dmg | [repack]
Double-click the downloaded DMG file to mount it on your desktop.
softwareupdate --fetch-full-installer --full-installer-version 10.13.6 Download Mac Os High Sierra 10.13.6 Dmg
Apple provides a direct link to the High Sierra installer on their support site: https://support.apple.com/en-us/HT208969 This downloads an InstallMacOSHighSierra.pkg (not a raw DMG), which extracts the full installer to the /Applications folder. Double-click the downloaded DMG file to mount it
