OS X El Capitan: Notifications preferences
Specify when you don’t want to be disturbed by notifications, and set options to control how apps show notifications and how they’re sorted in Notification Center.
To open Notifications preferences, choose Apple menu > System Preferences, then click Notifications. Select Do Not Disturb or an app on the left, then view or change its settings on the right.
| Do Not Disturb | Stop notifications during the time range you specify, when the display is in sleep, or when you’re projecting the screen. Select options to receive call notifications even when Do Not Disturb is on. |
| [App] alert style | Select a style for the app’s notifications:
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| Show notifications on lock screen | When you wake your Mac from sleep, app notifications you received while it was in sleep are shown in the login window. |
| Show message preview (available only for certain apps, such as Mail or Messages) | Show a preview of a message in message notifications. For example, if you receive an email, you see a preview of the email in the Mail notification.
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| Show in Notification Center | Choose how many of the app’s recent notifications to list in Notification Center. Notifications older than seven days aren’t shown. |
| Badge app icon | Let the app show the number of notifications on its icon in the Dock. |
| Play sound for notifications | Let the app play notification sounds. |
| Notification Center sort order | Choose how notifications are sorted in Notification Center:
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