If you already have the .app file, you can create a bootable ISO using Terminal by creating a sparse image, attaching it, using the createinstallmedia tool, and converting it to .iso format. 3. Alternative Third-Party Sources macOS High Sierra | Specs, reviews and EoL info - InvGate
Click the link for , which will redirect you to the Mac App Store . macos high sierra 10.13 6 iso download
Apple primarily distributes macOS through the App Store, but obtaining a standalone ISO requires specific steps. 1. The Official App Store Method (For Mac Users) The safest way to get the installer is directly from Apple. If you already have the