This is an incredibly common error triggered by expired security certificates. To fix it, disconnect your Mac from the internet, open Terminal during the installation setup, and roll back the system clock to a date close to the 2017/2018 release window using the command: date 1025101017 .
Apple provides the full installer through the App Store, which downloads as an file to your /Applications folder rather than a raw Apple Support Mac App Store : Use this App Store Link to find High Sierra. You must use the Safari browser for the link to redirect correctly. Terminal (Advanced)
Note: As of 2026, Apple no longer officially supports macOS High Sierra 10.13.1. This article is for informational purposes for users maintaining legacy hardware. macos high sierra 10131 dmg
macOS High Sierra was a major release focused heavily on technical improvements rather than cosmetic changes. It introduced APFS (Apple File System), HEVC (High-Efficiency Video Coding) support, and updates to Metal 2 graphics technology.
Whether you are creating a or a Virtual Machine This is an incredibly common error triggered by
Here’s a regarding the macOS High Sierra 10.13.1 DMG file—what it is, where to find it legitimately, and how to use it safely.
macOS High Sierra 10.13.1 represents the last era of the Mac that felt "classic." The UI still relied on 3D textures and lighter themes before the "Flat" design took over completely. It was the solidification of a new file system, and it remains the final haven for 32-bit holdouts. You must use the Safari browser for the
Improved reliability of the "Auto-Unlock" feature with Apple Watch. System Requirements
It introduced over 70 new emoji characters, including more diverse food types, animals, mythical creatures, and clothing options.
: Make sure your device meets the necessary system requirements for High Sierra.
(you need one of these):