Legal and security considerations

This must be downloaded via the Mac App Store . Use this official Apple link in Safari to open the App Store page directly.

High Sierra (10.13) remains one of the most stable and loved macOS versions, offering key features like the Apple File System (APFS), HEVC video support, and improved Metal 2 graphics, making it excellent for older hardware.

As Apple doesn't provide a direct DMG download link for macOS High Sierra, you'll need to use a workaround:

If you have a 2009-2011 Mac, you actually need Sierra (10.12), not High Sierra. Search for Sierra_DMG_10.12.6_Exclusive instead.

If you downloaded the official setup file via the App Store, it saves as an application (.app) instead of a disk image (.dmg). If you need a raw DMG file for deployment or virtualization, you can build your own using the terminal: Step 1: Create a Blank Disk Image

sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled Use code with caution.

The number one complaint from users who download macOS High Sierra 1012 DMG files is the error.

If you are trying to find an official and secure path to or its predecessor macOS Sierra 10.12 DMG , you are likely dealing with a small discrepancy in the version naming conventions. For clarity: macOS Sierra is version 10.12 , whereas macOS High Sierra is version 10.13 .

Compatibility Check: For Mac models from late 2009 to 2017

Enhanced graphics processing for smoother UI and better gaming performance.

command in Terminal to turn the installer into a bootable USB drive. Important Compatibility Notes How to download and install macOS - Apple Support

Essential for reinstalling or repairing macOS.

Recommendations (concise)

Advanced users can use the softwareupdate command in Terminal to fetch specific versions of macOS directly from Apple's servers. Creating a Bootable USB Installer

Open ( /Applications/Utilities/ ) and input the following block: