If you thought the 3D program in the original Jurassic Park movie was fake, you’re wrong. And you can install it on OS X. It’s called File System Visualizer (clone of the original 1992 SGI program, fsn) and has been around since 1999.
With Mac Ports, the installation is as easy as:
% sudo port install fsv Password: --> Computing dependencies for fsv
---> Cleaning fsv ---> Updating database of binaries ---> Scanning binaries for linking errors ---> No broken files found. %
And you’re done. Now you can run the File System Visualizer with the command fsv.