Convert the temporary image into a finalized, read-only production DMG file:
Once complete, the installer will save to your folder as Install macOS High Sierra.app . Do not let the installer run yet. Method 2: Download via Terminal (macOS Big Sur or Newer)
Once complete, the installer will launch automatically. the installer immediately; you need the raw application file inside your /Applications folder to create a DMG or bootable USB. Method B: Download via macOS Terminal macos high sierra 10136 dmg full
softwareupdate --fetch-full-installer --full-installer-version 10.13.6 Use code with caution. Copied to clipboard
High Sierra lacks drivers for T2 chips and newer SSDs. It will refuse to install. This OS is strictly for legacy machines (pre-2017). Convert the temporary image into a finalized, read-only
Minimum 2 GB of RAM (4 GB or more highly recommended).
: The most reliable way is through the official App Store link for High Sierra . If your Mac is compatible, this will download the "Install macOS High Sierra.app" directly to your Applications folder. the installer immediately; you need the raw application
Once finished, look for an app named inside your /Applications directory. Method 2: Terminal Download (macOS Catalina or Newer)
Before attempting to install macOS 10.13.6, ensure your Mac hardware supports it. Supported Mac Models 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 System Requirements Memory: Minimum 2 GB RAM (4 GB or more recommended).
Method 2: Downloading via Terminal (macOS Catalina or Newer)