Download+macos+high+sierra+10136+dmg+mac+install Online

A bootable USB is the most reliable method, especially if you are wiping the hard drive. You need an 8GB+ USB flash drive.

Step 1: Format the USB Drive

Step 2: Use the Terminal createinstallmedia Command

sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --nointeraction

Step 3: Boot from the USB

If you specifically need a DMG file (for archiving or creating USB bootable media on Windows), download the installer via Method A, then: download+macos+high+sierra+10136+dmg+mac+install

Do not rename InstallESD.dmg – it is the raw disk image used by the installer.

Step 1: Do not search for raw DMG files.
Step 2: On any working Mac, run:

softwareupdate --fetch-full-installer --full-installer-version 10.13.6

Step 3: If above fails, use gibMacOS (requires Python).
Step 4: Convert .app to bootable USB (optional):

sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/USB

Apple has a hidden direct link that triggers the App Store download. This is the safest method as it verifies the file with Apple. A bootable USB is the most reliable method,

Before running any DMG, verify you haven't downloaded a corrupted or malicious file. For macOS High Sierra 10.13.6 (Build 17G66), the correct SHA-1 checksum for the InstallESD.dmg is:

SHA-1: 0x6b4b553e3bd2559b71d1abd8c7d59c4b4822bf0c

Most modern macOS updates are handled through the System Preferences, but High Sierra is different. The standard installer from the App Store often fails on older machines or refuses to download on newer macOS versions like Ventura or Sonoma.

You specifically need the DMG (Disk Image) or the InstallESD.dmg file if: Step 2: Use the Terminal createinstallmedia Command

Apple still provides a direct link to the High Sierra installer via its support site:

| User Query | Actual Version | Status | |------------|----------------|--------| | 10136 | 10.13.6 | Build 17G66 / 17G14042 (final) |

Note: Apple does not distribute full macOS installers as simple .dmg files. The correct format is a .app bundle inside a .dmg or (more commonly) a .pkg wrapper.