Because High Sierra is no longer signed by Apple for direct download (Apple removed it from the App Store in late 2019), many third-party sites host DMGs. To ensure , verify:
You can access the macOS High Sierra download page through the App Store. Note that searching for it manually in the App Store often yields no results; you must use a direct link. macos high sierra 10136 dmg high quality
While third-party sites often host "high-quality" DMGs, the safest and most reliable method is to download the installer directly from Apple. Because High Sierra is no longer signed by