What is UserNotificationCenter?

UserNotificationCenter shows system dialog boxes on your Mac.

What does it do?

When a system process needs your attention, UserNotificationCenter puts up a dialog box. These are not the banner alerts that slide in from the top right corner. They are old-style pop-up windows that wait for you to click a button. Examples include:

• "This disk is not readable" when you plug in an unknown disk
• App crash dialogs
• System-level permission requests
• Warnings from low-level processes that need your input

How is it different from Notification Centre?

The banner alerts you see sliding in from the top right are handled by usernoted and the modern notification system. UserNotificationCenter handles the older kind of dialog box that blocks until you respond.

Should you worry?

No. It is a standard macOS process. Pay attention to the dialogs it shows, because they usually need you to make a choice or take note of something.

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