Consider whether you actually need this version, or if you could use a supported macOS version (Ventura, Sonoma, or Sequoia) instead.
: If you already have an earlier version of High Sierra (like 10.13.5), you can manually download the 10.13.6 Update or the 10.13.6 Combo Update directly from Apple.
: Get the "Install macOS High Sierra.app" from the App Store. macos high sierra 10.13 6 iso download
Because Apple provides a .app file, you must convert it into a bootable .iso file using the Terminal. Follow these precise commands step-by-step: 1. Create a Blank Disk Image
Create a new guest OS profile configured for macOS 10.13 High Sierra. Mount your ISO file into the virtual optical drive settings, allocate at least 2 CPU cores and 4GB of RAM, and boot the VM to start the installation wizard. Consider whether you actually need this version, or
For scripted environments, using the mas (Mac App Store CLI) tool is efficient.
This method is perfect if you are already running a version of macOS (like Sierra) and want to upgrade in place. Because Apple provides a
Click to download the installer. Your Mac will open the Software Update panel to pull the file.