Installed Drush from git (used the master branch to get the latest version).
Drush is available on my $PATH, when I type in "drush" from any terminal window, I get the help page (which I would expect).
I have MAMP installed running php5.4.4, with apache running on port 80, and have a drupal installation that is running in MAMP, and can be seen from a browser window at "http://drupalxp.local".
Opening a terminal window and navigating to the root drupal installation directory and running any drush command that requires bootstrapping the site results in the following error from Drush:
"No Drupal site found, only 'drush' cache was cleared."
Any ideas? I've googled all over the place searching for a solution to this one.