Manually install drush 5.4 on OSX Lion

gistfile1.sh

# Install Drush 5.4
> cd /opt
> sudo git clone --recursive --branch master http://git.drupal.org/project/drush.git
> cd drush
> sudo git checkout tags/7.x-5.4
> sudo ln -s /opt/drush/drush /usr/bin/drush
> sudo drush
> drush
> drush --version
  drush version 5.4
# Install 'Drush Site Upgrade'
> cd 
# The -p option will make the mkdir skip if the folder's already there
> mkdir -p .drush
> cd .drush
> git clone --recursive --branch master http://git.drupal.org/project/drush_sup.git
> drush  | grep upgrade
# Now the site-upgrade command should be found.