How do I install mathStatica under Mac OS X (10.1 or higher)?
Under Mac OS X, Mathematica is installed as a bundle, which is at the same time both an application and a folder. In order for mathStatica to work, it must be installed inside this bundle.
To view the contents of the bundle:
You can then install mathStatica in the normal way, as described on pages 3 and 4 of the book.