Hi Kerrie,
I'm not into Mac, but:
1. Did you download your package from: http://download.moodle.org/macosx/?
2. Are you following the instructions at: http://docs.moodle.org/25/en/Step_by_Step_Installation_on_a_Mac_OS_X_Server or at: http://docs.moodle.org/25/en/Complete_Install_Packages_for_Mac_OS_X?
I see references to that script at some threads in the forums, but I don't see any at neither of those two last pages.