Why is Python easy_install not working on my Mac?

Check your /usr/bin and /usr/local/bin for easy_install installations and remove any old script:

sudo rm -f /usr/bin/easy_install*
sudo rm -f /usr/local/bin/easy_install*

Download and run distribute:

curl -O https://svn.apache.org/repos/asf/oodt/tools/oodtsite.publisher/trunk/distribute_setup.py

sudo python distribute_setup.py
sudo rm distribute_setup.py

Try again, and enjoy. E.g.:

sudo easy_install pip