Mac makes beeping sound every five minutes without pop up notification. Origin unknown 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)
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.