: If you already have 10.13.x installed and only need the final 10.13.6 "Combo Update" to bring it to the latest version, you can download the macOS 10.13.6 Combo Update directly from Apple. Creating a macOS High Sierra ISO or USB
tab, and find High Sierra. You can choose to download it as a or a full application bundle. 3. Downloading ISO Files (For Virtual Machines) Apple does not officially provide macOS in download macos high sierra 1013 iso and dmg upd