In just 4 minutes you will know how to create a macOS Mojave USB Installation Boot Flash Disk. Also works for High Sierra, Sierra and El Capitan. Make your own macOS Mojave boot disk. You can use it to install macOS Mojave, to repair your current installation or perform maintanace tasks.
macOS Mojave is available for download at this App Store link:
Apple Support’s How to create a bootable installer for macOS: