As Chris said, you have to either use the internal scripting with manual script writing (text file, fairly cumbersome unless you're using to something like POVRay or writing Renderman Shaders), or use Applescript, which again involves some scripting ability. Unfortunately there are no animation helper tools comparable to Terranim or Campath on the Mac. If you can dual boot into XP or use an emulator to run Windows you could use either of those programs, which make the process a lot easier.
- Oshyan