If I recall correctly, ppython is a Windows wrapper EXE that sets up your path correctly to find the Panda libraries and then executes the Python installed with Panda. I noticed when I built Linux that it didn’t come out of the build process (at least, not on a path where I could find it), so I wouldn’t be surprised if the same were true of OSX. You can probably just ignore it and instead set your PYTHONPATH and LD_LIBRARY_PATH variables correctly (or write your own ppython shell script that does this).
Best of luck,
Mark