macOS High Sierra 10.13.6 Combo Update (recommended for updating from any version of 10.13). macOS High Sierra 10.13.6 Update .
Use Disk Utility to format a drive (at least 16GB) as Mac OS Extended (Journaled) . mac os x 1013 high sierra dmg download hot
You can find the macOS High Sierra page in the App Store. Note that searching for it directly may not work if your Mac is running a newer OS; you must use a direct link to trigger the "Get" button. macOS High Sierra 10
The standard App Store download provides an .app file in your Applications folder, not a .dmg . To create a bootable disk image or USB drive for a clean installation: mac os x 1013 high sierra dmg download hot
Apple provides "Combo" and standard updates for specific versions: