My MacBook Air makes a 'Du-du-du-du' sound every 20 seconds.
I put my MacBook in sleep mode yesterday afternoon, but from this evening it suddenly started making this sound. 'Du-du-du-du' It rang repeatedly at exactly 20 second intervals.
Even when I muted my MacBook, this sound rang. When I rebooted, it kept ringing during rebooting, and it kept ringing after shutting down the system.
Surprisingly, it has stopped now. It happened for about 30 minutes. What the **** is going on?
If anyone knows about this matter, please let me know.
2020 MackBook Air 13" (10.15.6)
MacBook Air 13″, macOS 10.15
