sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ macOS\ Sierra.app --nointeraction The terminal erases the USB, copies the hidden BaseSystem.dmg , and makes the drive bootable.
Disclaimer: This guide is for educational purposes. Always respect Apple’s software licensing agreements. The author is not responsible for any data loss or hardware damage. download macos sierra 1012 dmg file install
Introduction: The Endurance of macOS Sierra sudo /Applications/Install\ macOS\ Sierra