Drush 7.0 not connecting with Drupal - Error with bootstrapping

Hey all-

I've installed Drupal 7, Drush 7.0 and the Omega 4 theme. I'm using MAMP. I'm attempting to create an Omega subtheme with the command line:

drush omega-wizard

I then receive the following error:

The drush command 'omega-wizard' could not be found. Run `drush cache-clear drush` to clear
the commandfile cache if you have installed new extensions.
Drush was not able to start (bootstrap) the Drupal database.
Hint: This may occur when Drush is trying to:
* bootstrap a site that has not been installed or does not have a configured database. In
this case you can select another site with a working database setup by specifying the URI to
use with the --uri parameter on the command line. See `drush topic docs-aliases` for
details.
* connect the database through a socket. The socket file may be wrong or the php-cli may
have no access to it in a jailed shell. See http://drupal.org/node/1428638 for details.

I've looked everywhere for a fix for this and cannot seem to get a working solution. Any ideas/thoughts? Thanks in advance! --- I should also note that when I run something as simple as the command:

drush cc all

it clears the Drush cache but returns this error:

No Drupal site found, only 'drush' cache was cleared.