If you cannot access a Mac to build an ISO, trusted tech community archives like the Internet Archive host pre-compiled, unmodified clean ISO images. Search for "macOS High Sierra 10.13.6 ISO Clean Archive". Hardware Compatibility Check
Mount a sparse image using hdiutil , use the createinstallmedia tool to copy the installer to it, and then use hdiutil convert to finalize it as a .iso . download macos high sierra 1013 iso and dmg upd
Downloading macOS High Sierra 10.13 can be tricky because Apple primarily provides it as an If you cannot access a Mac to build
Download macOS High Sierra 10.13 ISO and DMG: Complete Update Guide Downloading macOS High Sierra 10
The downloaded file will be a .dmg file (about 5.2 GB). You can create an ISO file from the DMG file using tools like TransMac or AnyToISO .
Wait for the terminal to display "Copy complete" and "Done". This can take up to 20 minutes depending on your USB drive speed. How to Clean Install macOS High Sierra