Terminal will now copy the installer files to the drive. This process can take anywhere from 10 to 30 minutes depending on your USB drive speed. Once finished, Terminal will display "Install media now available." How to Install macOS High Sierra Using the USB Drive
Open your web browser and visit the official Apple Support page for older macOS versions.
If you need help with a specific part of the installation, let me know. I can give you the , help you troubleshoot installation errors , or guide you on how to back up your data safely before upgrading. Share public link
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Downloading and Installing macOS High Sierra 10.13.6 Whether you need to revive an older Mac or create a bootable installer for troubleshooting, obtaining macOS High Sierra 10.13.6 requires specific steps because Apple has transitioned most legacy downloads to the Mac App Store. 1. Check System Compatibility
The final version of this operating system brings stability and security updates to older hardware. macOS High Sierra 10.13.6 Build Number 17G66 (or later security variants) File Format DMG (Disk Image) / PKG Installer File Size Approximately 4.9 GB to 5.2 GB Release Date July 9, 2018 (Final major update) File System Apple File System (APFS) compatible Official Download Links for macOS High Sierra DMG
Press the to turn on the Mac, and immediately press and hold the Option (Alt) key. Terminal will now copy the installer files to the drive
If you need a DMG-like experience to install on another machine, you must convert the downloaded into a bootable USB: 16GB+ USB drive formatted as Mac OS Extended (Journaled) Run this command in Terminal:
Are you trying to install it on or a virtual machine ?
This is the most reliable way to get the full "Install macOS High Sierra.app" directly from Apple. Use Safari: macOS High Sierra App Store Link in Safari. Other browsers may fail to redirect correctly. The link will open the Mac App Store. Click Software Update: If you need help with a specific part
Method 2: Direct Terminal Download (For macOS Catalina or Newer)
Before proceeding with the installation, verify that your Mac hardware actually supports High Sierra. Late 2009 or newer MacBook Air: Late 2010 or newer MacBook Pro: Mid 2010 or newer Mac mini: Mid 2010 or newer iMac: Late 2009 or newer Mac Pro: Mid 2010 or newer Minimum Hardware Specs: At least 2 GB of RAM (4 GB or more is highly recommended).
You now have a clean, officially sourced macOS High Sierra 10.13.6 DMG file on your desktop. How to Create a Bootable USB Installer
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/HighSierra --nointeraction Use code with caution. Detach the newly flashed volume: hdiutil detach /Volumes/Install\ macOS\ High\ Sierra Use code with caution. Move the finished DMG file to your Desktop: mv /tmp/HighSierra.dmg ~/Desktop/ Use code with caution.