# 1. Create a blank disk image hdiutil create -o /tmp/HighSierra -size 5600m -layout SPUD -fs HFS+J # 2. Mount the created image to your system hdiutil attach /tmp/HighSierra.dmg -noverify -mountpoint /Volumes/install_app # 3. Use Apple's built-in tool to write the installer files into the image sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/install_app --nointeraction # 4. Detach the newly created installer volume hdiutil detach /Volumes/Install\ macOS\ High\ Sierra # 5. Convert the temporary image into a final, read-only DMG file hdiutil convert /tmp/HighSierra.dmg -format UDZO -o ~/Desktop/macOS_High_Sierra_10.13.6.dmg # 6. Clean up the temporary file rm /tmp/HighSierra.dmg Use code with caution.
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If you are on a newer Mac, you can fetch the installer directly from Apple's servers using this command:
While macOS High Sierra no longer receives active security updates, it is highly sought after for several specific use cases: download macos high sierra 10.13 6 dmg file
http://updates-http.cdn-apple.com/2019/cert/061-39476-20191023-48f365f4-0015-4c41-9f44-39d3d2aca067/InstallOS.dmg Note: This URL is a direct link to Apple's servers. Because it is a legacy file, the installer inside may require a date modification trick (explained in the troubleshooting section below) to run on modern hardware.
Open your web browser and navigate to the official Apple Support Download Page for macOS High Sierra. Use Apple's built-in tool to write the installer
The full installer is approximately 5.2 GB . The combo update is approximately 2.49 GB .