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Set an audio or visual alert in Terminal on Mac
Some messages and commands produce an alert in Terminal. You can select a visual alert that makes the Terminal window blink, or an audible alert that makes a sound.
- Go to the Terminal app  on your Mac. on your Mac.
- Choose Terminal > Settings, then click Profiles. 
- In the profiles list on the left, select a profile. 
- Click Advanced. 
- Below Bell, select the type of alert you want.