1

I'm experiencing an issue where exactly every 60 seconds, the screen briefly dims, then brightens, then beeps. I don't care about the dimming/brightening, but the beeping is maddening.

It happens while charging using a new (non-Apple) Magsafe3 connector I bought, connected to a 96W Apple power adaptor. This combo otherwise seems to charge fine.

So: can I fix this behaviour? Or at the least, prevent the beeping?

It's a 2022 M2 Max Macbook Pro. Ventura 13.6.3 (22G436)

EDIT

After some research I've discovered:

  • the screen dimming behaviour can be disabled in settings, "Slightly dim the display on battery"
  • the beep is called the "Power chime".

So now the question is how to disable the power chime. The actual file is at /System/Library/CoreServices/PowerChime.app/Contents/Resources/connect_power.aif but I'm not able to modify/remove it.

Improve this question

2 Answers 2

Reset to default
0

Ok, so to disable the screen dimming, uncheck "Slightly dim the display on battery" in settings.

To disable the power chime, in a terminal run:

killall PowerChime
defaults write com.apple.PowerChime ChimeOnNoHardware 1
defaults write com.apple.PowerChime ChimeOnAllHardware 0

As for why this cable causes macOS to think the power has been reconnected every minute...who knows.

Improve this answer
3
  • I would suggest checking the power subsystem's console logs. I remember seeing similar info in iPhone's sysdiagnose.
    – hym3242
    Commented May 28 at 5:39
  • This is just masking some underlying problem — a problem which may not be causing other visible effects, but might still be having an adverse effect on things such as battery health/life.  This would also prevent those notifications when power is removed.
    – gidds
    Commented May 28 at 16:16
  • True, but I'm really not sure that I need an audible notification in those cases.
    – Steve Bennett
    Commented May 29 at 3:32
0

You may be seeing an example of the problem described here:

https://discussions.apple.com/thread/255123412

and

https://discussions.apple.com/thread/255743439

Improve this answer
1
  • 1
    Welcome to Ask Different! Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference.
    – agarza
    Commented Sep 3 at 14:20

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .