Terminal.app doesn't quite have the right default set of bindings, but iTerm2 also has some wrong bindings around the meta key. If you want to enable option-as

Terminal.app doesn't quite have the right default set of bindings, but iTerm2 also has some wrong bindings around the meta key. If you want to enable option-as-meta in Terminal.app, you select the Profile you want in preferences, go to the Keyboard tab, and there's a checkbox at the bottom. This is also where you can customize the bindings for various key sequences, if you think they're wrong.