By default, the Alt-key doesn’t work inmacOS Terminal. Today I found a simple solution for this problem:Terminal > Preferences > Settings > KeyboardJust check ‘Use option as meta key’ at the bottom and you’re good to go

• Remi Bergma

ForiTerm2, you can set the option key as meta by going to iTerm > Preferences > Profile > (Active Profile) > Keys and you can see at the bottom of the pane there are radio choices for the options keys. Use+Esc to properly bind as the Alt-key.

Forkitty, seehttps://sw.kovidgoyal.net/kitty/conf.html#opt-kitty.macos_option_as_alt.

Forghostty, add macos-option-as-alt=true to your config. seehttps://ghostty.org/docs/config/reference#macos-option-as-alt

Setting up Kakoune on a Mac