Untitled
to represent your external drive. If your drive is named something else, you need to change Untitled
to the name of your drive.)sudo /Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install macOS Sierra.app
What to do when ‘this copy of the install OS X application cannot be verified’ or ‘the installer payload failed signature check’