Press . Terminal will stream the complete installer directly from Apple's content delivery network (CDN) into your Applications folder. How to Convert the Installer App to a DMG File
was a foundational update for the Mac, introducing technologies like APFS, Metal 2, and HEVC that we still rely on today. By 2026, its primary role has shifted from a cutting-edge OS to a specialized tool —perfect for reviving older Intel-based Macs, supporting legacy software, or populating virtual machines.
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/YourUSBName Third-Party Tools (Reliable Alternatives) How to download and install macOS - Apple Support mac os x 1013 high sierra dmg download hot
If you are trying to download the file from a Windows PC or an incompatible Linux machine to fix a broken Mac, the App Store method will not work. You must use trusted archive mirrors to get the raw DMG file.
"This copy of the Install macOS High Sierra application is damaged" By 2026, its primary role has shifted from
This was the star of the update. APFS is a modern file system designed specifically for Flash/SSD storage. It brought native encryption, crash protection (where data is less likely to be lost if your system crashes), and significantly faster directory sizing. It also introduced "Instant Cloning," allowing for incredibly fast file copying without taking up additional drive space.
Apple delivers the official download as an .app file, not a .dmg . If your project specifically requires a DMG file (such as for a Windows-based virtual machine), you must convert the downloaded application using Terminal. How to Convert .app to .dmg: Open . "This copy of the Install macOS High Sierra
This has been the case for . Since its final security update in November 2020, Apple has designated this version as obsolete and has officially removed it from general distribution through the Mac App Store. However, the demand for a "macOS 10.13 High Sierra DMG" hasn't vanished. Many users with older, unsupported Macs still need this specific OS to revitalize their machines or run legacy applications.