On new Macbook Pro, Power Chime runs. Whenever I delete from core services it comes right back. It makes a sound when plugging in your power cord even when the volume is at 0%.

The solution I have now to disable this annoying sound is an AppleScript application that runs on login to kill the process via terminal. Is there a better way?

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    What's your address? I'll send you something. LOL Oh wait, maybe I should send it to Tetsujin? :) – Monomeeth May 5 '17 at 7:24
  • unfortunately idont think his solution works. – user7875084 May 5 '17 at 16:22
  • Has anyone tried to just delete the power chime app in the system files folder? – Jake Feb 16 '18 at 18:31
  • OP, you should accept the answer below: apple.stackexchange.com/a/309947/190701 – guyarad Mar 28 '18 at 3:11
  • @Jake sudo rm: /System/Library/CoreServices/PowerChime.app/Contents/MacOS/PowerChime: Operation not permitted – John Jiang Jan 5 '19 at 16:33

The solution is to set ChimeOnNoHardware to true instead of setting ChimeOnAllHardware to false (note, No instead of All):

defaults write com.apple.PowerChime ChimeOnNoHardware -bool true
killall PowerChime
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    Thank you. This what worked for me on high sierra. – SFbay007 Mar 20 '18 at 3:46
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    I tried this command and got this message: "No matching processes belonging to you were found" – Disco Danny Nov 7 '18 at 4:32
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    @DiscoDanny use sudo – Matthew Barclay Feb 1 '19 at 3:20
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    ran this once and it works mostly, but the chime still goes off with the lid closed and the laptop locked/sleeping. – worc Feb 13 '19 at 17:54
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    Works on Mojave, but yes the chime still goes off w/the lid closed. Also, just from testing this ~5 times I feel like the USB-C cable or port is likely to break in short order. Port is too tight & the cable is as flimsy as they always are from Apple. RIP Magsafe... – mc01 Apr 9 '19 at 17:26

Here's another solution since the others provided don't seem to be working for you. You can create an empty AIFF file to replace the default chime. The chime audio is located here:


I created an empty AIFF file using Adobe Audition. With SIP disabled, I backed up the original chime and replaced it with my new audio file:

sudo mv /System/Library/CoreServices/PowerChime.app/Contents/Resources/connect_power.aif /System/Library/CoreServices/PowerChime.app/Contents/Resources/connect_power.aif_bak
sudo mv ~/Desktop/null.aif /System/Library/CoreServices/PowerChime.app/Contents/Resources/connect_power.aif

Be sure to fix the permissions on the file:

sudo chown root:wheel /System/Library/CoreServices/PowerChime.app/Contents/Resources/connect_power.aif
sudo chmod 644 /System/Library/CoreServices/PowerChime.app/Contents/Resources/connect_power.aif

No more audio when connecting your power source.

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  • 2
    Thanks a million this worked like a charm! I copied the AIF to the desktop, opened the file, muted it and then saved it. Disabled SIP and replaced it (I didn't use Terminal I just dragged and dropped), then ran those two permissions line commands and BOOM! No more power chime. – Disco Danny Feb 3 '18 at 1:56
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    This stopped working after updating to OS 10.13.6! I looked at the AIF file and it is silent, so I have NO IDEA how it found that horrible sound again! Now I'm back to square one. – Disco Danny Nov 7 '18 at 4:30
  • Ditto @DiscoDanny. – Philip Jul 26 '19 at 12:50
  • Doesn't work with lid closed on Mojave. – minipif Aug 1 '19 at 3:19

I'm using this tool on all MacBooks after 2015, it allows to quickly switch PowerChime sound


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In case anyone wants my AppleScript I'm using to stop this:

tell application "System Events"
    delay 3
    set ProcessList to name of every process
    if "PowerChime" is in ProcessList then
        set ThePID to unix id of process "PowerChime"
        do shell script "kill -KILL " & ThePID
    end if
end tell

But really looking for another way. Any help is appreciated. Thanks.

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Tested on MacBook Air - MacOS High Sierra

Open Terminal and

sudo nvram SystemAudioVolume=%00

You’ll be asked to enter your password.

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    What does it do? Turn off all sound on a laptop? We do not want all to be OFF – Joe Jan 14 at 16:32

On Mojave you can do the following:

ps -eaf | grep Chime
  502 17070     1   0 10:48AM ??         0:00.24 /System/Library/CoreServices/PowerChime.app/Contents/MacOS/PowerChime
  502 17740 16102   0 10:50AM ttys002    0:00.00 grep --color=auto --exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn --exclude-dir=.idea --exclude-dir=.tox Chime

Find the pid of the powerchime app in this case is 17070

then do a:

kill -9 17070

It'll start back up at startup but def kills the process while you're working.

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