sudo su -followed by return key and enter administrator's password followed by return key
defaults write /Library/Preferences/ManagedInstalls SoftwareRepoURL "http://munki.crossroadsacademy.org" defaults write /Library/Preferences/ManagedInstalls InstallAppleSoftwareUpdates -bool False defaults write /Library/Preferences/ManagedInstalls SuppressStopButtonOnInstall -bool True
AND ONE OF
defaults write /Library/Preferences/ManagedInstalls ClientIdentifier "crossroads_student" defaults write /Library/Preferences/ManagedInstalls ClientIdentifier "crossroads_staff" defaults write /Library/Preferences/ManagedInstalls ClientIdentifier "crossroads_optonly"