Drush is a great command line tool, but how do you get it on your computer?
What are the parts to the installation?
How do I use it, or know if it's available for use?

We will go over these using a mac, and try to answer any questions you may have, during this BoF, which is a follow up to the session: https://prague2013.drupal.org/session/drush-do-i-really-have-use-it.