Always use Safari to download from Apple's links. Conclusion
Type your Mac’s administrator password when prompted (no characters will show on the screen while typing) and press .
Downloading requires specific methods depending on your current hardware, as Apple has officially moved this version to its legacy support category. Official Download Methods
If you need to install High Sierra on a machine that Apple does not officially support, you may need to look into (use with caution). download macos high sierra 10.13.6 dmg mac
Set the Name to Untitled , the Format to , and the Scheme to GUID Partition Map . Click Erase . Close Disk Utility and open Terminal .
You will also need at least to perform the upgrade.
Downloading and installing macOS High Sierra 10.13.6 in 2026 requires a bit of archival navigation, but it remains entirely feasible for legitimate use cases. Your best bets are the Mac App Store for a direct upgrade or trusted utilities like iBoysoft DiskGeeker for obtaining a clean DMG file. By following this comprehensive guide, you can successfully reinstall or upgrade an older Mac, run legacy software, or perform other necessary tasks with confidence. Always use Safari to download from Apple's links
That creates a HighSierra.dmg on your desktop.
Here are fixes for the most frequent problems users face when trying to download macOS High Sierra:
Once you have your Install macOS High Sierra.app or the .dmg file, you will likely want to create a bootable USB installer. This allows you to perform a clean install (wiping your hard drive) or install the OS on multiple Macs without re-downloading. Official Download Methods If you need to install
Move the resulting DMG file to your desktop for easy access: mv /tmp/HighSierra.dmg ~/Desktop/HighSierra.dmg Use code with caution.
Type date 0101100018 (this resets your system clock to January 1, 2018) and press Enter. Close Terminal and restart the installation process.