My 2017 iMac Pro beeps once every 12-13 seconds, even when shut off.

At first I thought notifications had an issue. Turned them all off. The beeping persisted. So I restarted, and reset the SMC. The beeping persisted. I then shut the iMac down and was amazed when it continued beeping, once every 12-13 seconds.


Anybody ever seen or heard of this?

iMac Pro, macOS 15.5

Posted on Jul 11, 2025 10:41 PM

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8 replies

Jul 12, 2025 06:53 AM in response to DaveTheSafecracker

Disconnect all other USB devices except for a USB keyboard and mouse if you use those.

If the beeping stops, then it is one of those USB devices.


Then reset the SMC again as per > Reset the SMC of your Mac - Apple Support

Desktop computer:

  1. Shut down your Mac, then unplug the power cord.
  2. Wait 15 seconds, then plug the power cord back in.
  3. Wait 5 seconds, then press the power button to turn on your Mac.


If you hear beeping while the iMac Pro is unplugged, then it is some other device in the area.

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My 2017 iMac Pro beeps once every 12-13 seconds, even when shut off.

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