hdiutil create -o /tmp/Install\ macOS\ Mojave -size 6000m -layout SPUD -fs HFS+J
hdiutil attach /tmp/Install\ macOS\ Mojave.dmg -noverify -mountpoint /Volumes/Install\ macOS\ Mojave
echo Y | sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/Install\ macOS\ Mojave
hdiutil detach /Volumes/Install\ macOS\ Mojave
hdiutil convert /tmp/Install\ macOS\ Mojave.dmg -format UDTO -o ~/Documents/Install\ macOS\ Mojave
rm /tmp/Install\ macOS\ Mojave.dmg