Mac mini Beeps intermittently
Every now and then my Mac mini will make a beep - this is not at startup and system has been running for weeks.
How do I identify why it is beeping - I see no other notification?
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For starters we need to know
the year model > Identify your Mac mini model - Apple Support
and the macOS version > Find out which macOS your Mac is using - Apple Support
If it is not a startup beep, see > If your Mac beeps during startup - Apple Support
Then check your System Settings/Preferences > Sound > Sound Effects/Alerts
see > Change the alert sounds on Mac - Apple Support
Next check your Notifications setting for an audible sound alert.