Delete reminders on Mac
On your Mac, delete reminders you no longer need and remove completed reminders.
Delete reminders
If you don’t need to keep a reminder, you can delete it. If you think you might want to view it again, mark the reminder as completed instead.
In the Reminders app
on your Mac, select the reminders you want to delete.Press the Delete key.
Delete completed reminders from a list
In the Reminders app
on your Mac, select the list that contains completed reminders you want to delete.Scroll to the top of the list until you see the Show or Hide button.
Click Clear, then choose an option.
Click Delete.
Delete completed reminders from all your lists
In the Reminders app
on your Mac, select the Completed Smart List in the sidebar.Scroll to the top of the list, until you see the Clear button.
Click Clear, then choose an option.
Click Delete.
If you don’t see the Completed Smart List in the sidebar, choose View > Show Smart List, then select Completed so that a tick mark appears next to it.