Meta is usually Alt in emacs, but it should be noted that everywhere else, Meta usually refers to Super (which is called "Cmd" in Macs and "Windows Logo Key" in

Meta is usually Alt in emacs, but it should be noted that everywhere else, Meta usually refers to Super (which is called "Cmd" in Macs and "Windows Logo Key" in Windows). (And macOS's built-in emacs keybindings available in every textbox uses ctrl+opt for meta.)