: Use Disk Utility to format a USB drive (at least 8GB-16GB) as Mac OS Extended (Journaled) GUID Partition Map Run createinstallmedia

Common sources (use with extreme caution – malware risk):

sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/USB Use code with caution. Copied to clipboard Enter your password and wait for the process to finish. Using macOS High Sierra in 2025

This specific update (released in June 2018) introduced several improvements for all users: