Hi There,
You need to configure the mac 'terminal' application so the 'alt / option' key sends 'meta'. In order to do this, go to:
Terminal > Preferences > Settings > Keyboard
and select the 'Use option as meta key' checkbox at the bottom of the window.
I hope that helps,
-Denali
Aquamacs is an Aqua-native build of the powerful Emacs text editor. By "Aqua-native," we mean more than just the fact that this version of Emacs runs as a standard OS X application. ...