At least 14.3 GB of available storage space to perform the upgrade
: The most secure way to download is through the App Store link for macOS High Sierra . This will download the "Install macOS High Sierra.app" to your Applications folder. Download Mac Os High Sierra 10.13.6 Dmg
⚠️ If you're on a newer Mac (macOS Catalina or later), the download may fail because the installer is old. If that happens, use . At least 14
The link will automatically redirect you to the hidden Mac App Store High Sierra Page . Click or Download . If that happens, use
: If you already have an earlier version of High Sierra (like 10.13.5), you can download the 10.13.6 Combo Update or the standard 10.13.6 Update directly as a DMG/PKG from Apple. Creating a DMG or Bootable Installer