Install MacOSX to USB Using Teminal on a Mac, login to super user by typing in "sudo su" and then enter your login password. In most of these, you need to either label your usb stick "MyVolume" bu tI usually call mine "usb" and edit the commands accordingly. - Shannon James 2019 Sierra /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/ usb --applicationpath /Applications/Install\ macOS\ Sierra.app High Sierra sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/ MyVolume Mojave sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/ MyVolume