“Hey Siri” on your Mac

On your MacBook Air, Siri is now available whenever you say “Hey Siri” and immediately speak your request (your MacBook Air lid must be open). Play music, set up a meeting, open a file, and more by using your voice. You can enable the “Listen for ‘Hey Siri’” option in the Siri pane of System Preferences. See Siri on your Mac.