Notification Center
macOS users may also disable alerts and banners for a day, stopping notifications appearing on the screen. This can be achieved by either opening the Notification Center panel, scrolling upward, and toggling Do Not Disturb on, by holding the Option key while clicking on the Notification Center icon in the Menu Bar, or in System Preferences. However, any notifications sent during this time are still visible in the Notification Center panel. A similar service is included in iOS 6 as part of the "Do Not Disturb" feature.