How can I reduce the amount of time before a macOS / OS X Notification Center banner dismisses itself?
2 Answers
Open your terminal and run this command
defaults write com.apple.notificationcenterui bannerTime SECONDS
where SECONDS is a number for how many seconds you want the banner to be displayed.
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Well, it doesn't work again in Monterey, the defaults command takes no effect.– chatskiCommented Jan 26, 2022 at 8:58
Currently, you cannot change the duration. But you can dismiss it manually by placing the cursor over the banner and doing a two finger swipe from left to right on a trackpad (or a one finger swipe on a magic mouse).