Question:
Is there a command line tool to Enable/Disable the Mac Signup Client software on a Mac.
Answer:
There's a tool bundled into the Setup Assistant called SignUpEnabler that can be used to disable the authentication for you. It does need to be s root, but the command is:
/Library/Application\ Support/Pharos/Utilities/SignUp\ Setup\ Assistant.app/Contents/Resources/SignUpEnabler disable.
Note: Running it with 'enable' instead of 'disable' will turn it back on.