0xbb/macbook-mute.sh

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Turn off Macbook startup sound - Linux

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macbook-mute.sh

	#!/bin/bash
	printf "\x07\x00\x00\x00\x00" > /sys/firmware/efi/efivars/SystemAudioVolume-7c436110-ab2a-4bbb-a880-fe41995c9f82

OdinElfson commented Jun 8, 2020

I've been looking all over the web, all day, for a solution to this--> jradmacher you're a genius. Thank you thank you!

ngeorger commented Sep 14, 2021

Genius, thank you!

sharpsounds commented Jun 15, 2022

try just doing su before doing printf
its a pretty sensitive directory so it could be that your distro is being a bit extra cautious?

daudix commented Sep 10, 2022

If anyone needs :)

#!/usr/bin/bash

# Mute MacBook Chime

## Make "chime" value mutable

sudo chattr -i /sys/firmware/efi/efivars/SystemAudioVolume-7c436110-ab2a-4bbb-a880-fe41995c9f82

## Change "chime" value to "muted"

sudo printf "\x07\x00\x00\x00\x00" > /sys/firmware/efi/efivars/SystemAudioVolume-7c436110-ab2a-4bbb-a880-fe41995c9f82

## Make "chime" value immutable again

sudo chattr +i /sys/firmware/efi/efivars/SystemAudioVolume-7c436110-ab2a-4bbb-a880-fe41995c9f82

printf "\n🎉️🔇️ Now you don't have startup chime anymore!"

daudix commented Sep 10, 2022 •

edited

Also, anyone knows is there a way to enable it back? (just want to know)

glubsy commented Jan 29, 2023

Can't find that path while running Debian on a Mac Mini a1347. Perhaps because I'm not even using UEFI and only MBR boot with grub?

zeddD1abl0 commented May 7, 2023

I found that I had to specifically install efivar before the SystemAudioVolume variable was available. I also had to run @daudix-UFO 's script as root (via sudo su) as anything done as sudo didn't work.

ADBeveridge commented May 10, 2023

@daudix-UFO to reenable it, just clear the nvram. Cmd + Options + P + R at the same time right on boot. Hold it for 20 seconds, the mac will reboot a couple times. And now you have that startling sound again 🤣. At least this is what i got with a 2012 iMac.

leifliddy commented Aug 30, 2023

I have a MacBook9,1 and a MacBookPro14,1 -- and on both of these models I needed to set the hex value to 80
Setting it to 00 did not work. I'm surprised no one has posted anything on this topic before.....

 printf "\x07\x00\x00\x00\x80" > SystemAudioVolume-7c436110-ab2a-4bbb-a880-fe41995c9f82
 # probably wasn't needed, but changed the value of SystemAudioVolumeDB to match SystemAudioVolume
 printf "\x07\x00\x00\x00\x80" > SystemAudioVolumeDB-7c436110-ab2a-4bbb-a880-fe41995c9f82

ammar-faifi commented Jan 30, 2024 •

edited

it only worked when i use yours @leifliddy 🫡,thanks

on MacBookPro13,1
i didn't need to overwrite the SystemAudioVolumeDB-* one

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