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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:

https://drive.google.com/open?id=1vkuE5VEGzaZYtVF1X_V4tQh5ADb2W1qe

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, 2019 at 19:21
  • The logs show 3 minutes and some seconds past the half-hour.
    – IconDaemon
    Jun 9, 2019 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
    – leon
    Jun 10, 2019 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, 2019 at 7:52

2 Answers 2

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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.

enter image description here

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One potential source of an elusive beep is Gmail on Chrome.

Screenshot of the Desktop notifications in Gmail not Chrome

If you run Gmail on Chrome, go to Gmail Settings (not Chrome Preferences), look at General > Desktop Notifications, and confirm whether the sound you hear is the one selected (and whether there is incoming mail at these times).

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