Maximka has figured out how to install and run wifit.py on a mac. Thanks Max!! Here are the copy/pasted instructions.
(1) Install MacPort  . I tried out MacPorts v.2.2.0 on both Mac OS 10.6 and 10.7.5. After the initial install, run the selfupdater to make sure your install is totally up to date:
sudo port -v selfupdate
(2) Install the numpy and PIL libraries. MacPort takes care of the dependencies which is very sweet.
sudo port install py27-numpy sudo port install py27-pil
(3) Download and unzip the wifit code . Change into the directory and call the wifit program from the command line. It’ll open up an interactive window.
I didn’t want to remap my default python in order to play with my badge, so I call “python2.7” If you want to make the MacPort 2.7 the default do this:
sudo port select python python27 python wifit.py
(4) Follow the Wyolum instructions for using their awesome tool.