[The Dougfather]

For cleaning up audio on the Mac i've not really used Pro Tools that much, there are plugs available but i have a tendency to use third party apps especially when theres video involved. If you have the Final Cut Studio editing suite then Soundtrack Pro has some great cleanup tools, theres a nice little tutorial on the accompanying DVD to get you started. Also Bias Peaks Soundsoap plugins always rate quite highly.

Cheers