Macos High Sierra Download Dmg Install

Apple provides a support page that redirects to the Mac App Store:

Note: If the App Store says “Update not available,” you may need to use a terminal method.

If you want to wipe your drive and start fresh (highly recommended for older machines), don't run the installer from your current desktop. Create a bootable USB drive.

What you need:

The Terminal Command: Connect your USB drive (named "MyVolume" for this example) and open Terminal. Paste this command:

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

Note: You will need to enter your admin password. The terminal will erase the USB drive and make it bootable.

macOS High Sierra (10.13) is an older macOS release. Below are concise steps to obtain the installer, create a DMG or bootable installer, and install it safely. macos high sierra download dmg install

Simply having the DMG is not enough to install the OS. You cannot boot from a DMG file directly.

To Create a Bootable USB: If your goal is to install High Sierra on a Mac, you must convert the contents of the DMG (or App) to a USB drive.

Once you have the Install macOS High Sierra.app (or a DMG that extracts to it), verify it hasn’t been tampered with. Apple provides a support page that redirects to

If you have a DMG file (e.g., HighSierra.dmg), double-click it to mount, then drag the .app to your Applications folder.

There are archives (such as the well-known "Mints" archives or Internet Archive) that host pre-made DMG files of High Sierra.