Download Academic version for free at http://www.enthought.com/products/edudownload.php
Neuron must be installed from source in order to import neuron as a python module in enthought. This has been tested on Mac OS X Snow Leopard.
mkdir /nrn
cd /nrn
hg clone http://www.neuron.yale.edu/hg/neuron/iv
hg clone http://www.neuron.yale.edu/hg/neuron/nrn
cd /nrn/iv
./build.sh
./configure --prefix=/nrn CFLAGS='-arch i386' CXXFLAGS='-arch i386'
make
make install
make clean
cd /nrn/nrn
./build.sh
./configure --prefix=/nrn --with-iv=/nrn PYLIBLINK='-framework Python' PYLIB='-framework Python' CFLAGS='-arch i386' CXXFLAGS='-arch i386' --with-nrnpython PYLIBLINK='-framework Python' PYLIB='-framework Python'
make
make install
make clean
cd /nrn/nrn/src/nrnpython
python setup.py install
Test NEURON in a new python session
>>> from neuron import h, gui
>>> soma = h.Section()
>>> h.run()