Install Ruby WordNet on Mac OS X

(Untested - this is the gist of what you need to do)

Install Macports

http://www.macports.org/install.php

Get the latest TCL/TK:

http://www.activestate.com/activetcl/

Get Berkley DB:

sudo port install db47

Install BDB bindings for Ruby:

sudo env ARCHFLAGS="-arch i386" gem install mattbauer-bdb --source http://gems.github.com -- --with-db-include=/opt/local/include/db47 --with-db-lib=/opt/local/lib/db47

Install Ruby-wordnet

sudo gem install wordnet

Get the wordnet files and convert to Berkley DB

wget http://deveiate.org/code/wordnet-x.y.z.tar.gz
tar xzvf wordnet-x.y.z.tar.gz
cd wordnet-x.y.z
sudo rake install