Here are the most effective ways to obtain a legitimate version, whether you need a DMG for a physical Mac or an ISO for a virtual machine: Official Apple Download Method (Recommended)
The most reliable way to obtain the installer is directly through Apple's ecosystem, which ensures the file is untampered. App Store Link: Apple provides a specific direct link to macOS High Sierra that opens the App Store on a compatible Mac. Terminal Command: descargar macos high sierra 10.13 6 iso espa%C3%B1ol com dmg