Most of us are familiar with the Do Not Disturb feature on our iPhones since they’re with us for most of the day and often spend the night next to the bed. But did you know it was also available on the Mac? Apple long ago added Do Not Disturb to the Mac, and it’s useful for muting your Mac at night to eliminate unnecessary noises and for preventing unwanted notifications during presentations. In System Preferences > Notifications > Do Not Disturb, you can tell macOS to turn the feature on during specific times, when the display is sleeping or locked, and when mirroring to another screen. Or, you can turn on Do Not Disturb manually—you might want to do this when giving a presentation with Zoom or another videoconferencing app. I turn it on manually when I am recording. In macOS 10.15 Catalina and earlier, you do this in Notification Center by clicking it at the far right of the menu bar, once you are in the Notification Center, the option to turn it on at the top, you may have to swipe down to see it. In macOS 11 Big Sur, you find Do Not Disturb in Control Center.