To ensure the downloaded installer matches Apple’s original release, verify the checksum.
Avoid random "DMG download" websites. They are notorious for bundling malware, adware, or corrupted disk images. The only safe source is Apple. macos high sierra 10.13.6 dmg download
Use the official macOS High Sierra App Store Link . This will open the Software Update or App Store app to download the full "Install macOS High Sierra.app" to your Applications folder. macos high sierra 10.13.6 dmg download