My Mac (Macbook pro 13 early 2011, running 10.13.6 (High Sierra) makes unknown sound exactly every five minutes. I already tried rebooting and PRAM reset. Didn't help.

The sound it makes:


If anyone could help, I would extremely appreciate. Thank you very much.

console: (10:33:38)

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  • I had a similar issue a long time ago. Turns out I had inadvertently turned on the beep every half hour feature in Date and Time preferences... DOH! Jun 9 '19 at 19:21
  • The logs show 3 minutes and some seconds past the half-hour.
    – IconDaemon
    Jun 9 '19 at 19:52
  • There is this feature that has your mac beep every 30 mins. Maybe you accidentally turned it on? It's in System Preferences -> Date and Time -> Clock -> Announce the Time Jun 10 '19 at 1:51
  • Thank you Steve Chambers and An Existing Person for a recommendation, however, unfortunately, this isn't the case. The option to announce the time is turned off.
    – Matus
    Jun 10 '19 at 7:52

Thank you all for commenting.

Finally, I managed to identify the culprit. The sound (beeping) was actually an alert by the app (Effortless). (I quit app by app, when the sound suddenly stopped). The alert got probably turned on by a recent update, as I don't remember turning it on/off.

Here is the preference I needed to turn on to mute the sound.

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