Set event alerts and receive notifications in Calendar on Mac
Be notified of an upcoming Calendar event by setting one or more alerts. An alert can place a notification on your screen, send an email or open a file.
Set an alert for an event
In the Calendar app
on your Mac, double-click or force click an event to view event details, then click the event’s time.Click the Alert pop-up menu, then do one of the following:
Choose a time or day.
Choose Time to Leave. This option only applies if you added a location. For information about how time to leave is calculated, see Add a location.
Choose Custom, then choose an option:
Message: Displays a notification on the screen.
Message with sound: Displays a notification on the screen and makes a sound.
Email: Sends you an email.
Open file: Opens the file you choose.
To add another alert, place the pointer over the Alert pop-up menu, then click the Add button
.You can set only one alert for Exchange events.
To remove an alert, click the Alert menu, then choose None.
Turn off alerts for a calendar
In the Calendar app
on your Mac, Control-click the name of the calendar in the calendar list, then choose Get Info.If you don’t see the calendar list on the left, choose View > Show Calendar List.
Select “Ignore alerts”, then click OK.
Show or hide all Calendar alerts
On your Mac, choose Apple menu
> System Preferences, then click Notifications.Click Calendar on the left, then select whether you want invitation notices and event alerts to appear as banners or alerts, or not to appear.
Dismiss alerts
When an alert appears, you can either close it or temporarily dismiss it.
In the Calendar app on your Mac, do any of the following:
To never see the alert again, click Close.
To dismiss the alert for 15 minutes, click Snooze.
To dismiss the alert for another time period, click and hold Snooze, then choose an option.