1. Mac Startup Sounds
2. Mac Startup Sound Too Loud
3. Mac Startup Sound Effect
4. Mac Startup Sound Over And Over

All the files you will see are saved.aiff - this is the Audio Interchange File Format used by Apple on its computers. There are startup sounds and various VoiceOver chimes in multiple languages. Every Mac with the T2 chip has its startup sound chime turned off. Apple Mac Boot Up Sound Start Up. This is the current sound that any Mac OS X computer makes when first booted. Addeddate 2010-02-06 09:40:24 Identifier.

The Mac computer startup chime is now a thing of the past. Apple has reportedly removed the iconic sound and replaced it with (gulp) silence on the new MacBook Pro. “The new Macs actually automatically turn on when opened, so it’s possible that the removal of the sound is to prevent an unintended interruption just because you opened your.

Wow... so obvious. Once you know the answer.
Can't believe I never thought to try that. Thanks.

The startup chime simply plays at whatever volume your computer was set to when it shut down. So rather than mucking around in Sound Preferences, just press the mute button on your keyboard before shutting down.

Not so, Sesquipedalian. On my 2008 Mac Pro running 10.7.4, the startup chime doesn't 'simply' play at the volume you've set. It's true that muting the sound does suppress the startup chime, which I hadn't realized. But this hint was a revelation to me because I ALSO didn't realize I could set volumes for the internal and external speakers separately and have them STICK independently.
My startup chime plays through the internal speakers, and I want it always set at a low volume (but not muted). Other audio plays through my external amplifier and speakers, and I'm constantly adjusting that volume to suit what I'm listening to. Thanks, S.Patton, for the helpful hint!

Have you tried the startup sound pref pane?
http://www5e.biglobe.ne.jp/~arcana/software.en.html#StartupSound
I used it on my Mom's iMac and it worked nicely. I am not sure how it operates in Lion, however.

You could also install the Arcana StartupSound Preference pane, that mutes the startup chime without altering your volume settings (actually it sets volume to zero at shutdown and resets it after boot, but gets the job done). You can find it on Macupdate.
Currently it doesn't work under Lion.
Another simple solution is using two scripts, one running at shutdown and the other at startup, that do the same thing: set volume to zero wen shutting down and reset to custom preferences at login.

Their website (http://www5e.biglobe.ne.jp/~arcana/index.en.html) states the incompatibility with Lion as well. It was a useful utility to me until now. And, I hope that it will be updated to work with Lion and Mountain Lion.

Is this really a hint?

Yes! Absolutely it is! It just needs to add one additional step:
5) don't touch the volume ever ever ever again in fact rip the keys off your keyboard because this is a Mac OS X Hints hint.

Is this really a reply?

Mac Startup Sounds

The hint is: volume control is separate for internal and external speakers. Seems to me that that is rather obvious to anyone who has ever plugged in headphones.

Being reader for a long time, I had to register just to make things clearer about this! (two things to understand):
- Starting chime ALWAYS sounds from the speaker/s of your mac,
- All Apple machines remember independient volume settings; just adjust each (your macios knows the last volume level you chose without a line out connected, so unplug the wire -ex. speakers/earphones- and JUST set volume down, even till mute, if you want. Plug on the sound line out, and JUST choose the volume level. On next startup, chime will sound even muted -as playing trough int. speakers, and every else will sound as plugged)
In all, is a very consistent behavior, and forget going to Preferences; it's not needed.
(I once spent some time searching for an app to mute startup... and it was all much easier!)

Perhaps because I always adjust the balance setting (my Macbook is used closer to one of the extermal speakers, so I can't have it in the middle) my sound settings, including the volume ALWAYS reset on a reboot. The balance goes back to the middle, the volume always increases. Which of course means I have to re-adjust EVERY time I reboot. (which I don't have to do often, but still, it's annoying)

I use Psst and it still works in Lion. Much easier and it has volume control. Donation.

Mac Startup Sound Too Loud

Apparently, this hint works for some people. It also doesn't work for many people, as an Internet search will reveal. I've tried this hint on a 2011 MacBook Pro, a 2008 MacBook Pro, a 2009 iMac, and several other computers. I've tried all the variations that I can think of. I set the internal speakers to no volume, with and without the Mute checkbox checked. I've set the external speakers to no volume (Headphone, in the Sound control panel), again, with and without the Mute checkbox checked. With these settings, I've restarted with the external speakers plugged in and with them unplugged. I've restarted with the Mute button on the keyboard pressed. In every case, the chime sounds at its normal loud volume, from the internal speakers, on every restart.
I don't know why this hint works for some people and not for so many others. If anyone can shed light on the reason for the differences, it would be a very valuable addition to this hint.

Introduction: Customize MacOS Boot

Did you know that the T2 security chip offers more than just protection of your Mac computer? Learn how you can customize macOS systems with ease and make a unique and comfortable operating system with a custom startup sound you will love.

The tips in this article will work for any device with the T2 security chip, including iMac Pro, the latest iMac 2020, earlier Mac Pro 2019, Mac mini 2018, MacBook Pro 2018/newer version, MacBook Air 2018/newer model.

What Is .AIFF File Type?

AIFF is a standard for audio files stored on Apple computers and devices. AIFF abbreviation means the Audio Interchange File Format, which Apple developed back in 1988.

AIFF files' extensions are .aiff and .aif. These files are not compressed like mp3, so they require more storage space on your disk.

How to Change macOS Startup Sound

Mac Startup Sound Effect

If you are not happy with your current macOS startup sound, you can easily modify it. It is possible to add slight changes to your T2 chip system. This way, you will pick a different macOS boot chime.

By the way, all your boot chimes, also known as tones or sounds, can be found in the Mac folder:

Follow our guide on how to change macOS startup sound, and you will get a fun boot chime within minutes.The first thing you should do is jailbreaking. Please beware that you follow all the steps described in this guide at your own risk. While nothing should damage your Mac computer, it is still risky to interfere with the operating system code and change macOS startup sound.

Mac Startup Sound Over And Over

• Step 1. Before you can jailbreak a Mac computer, it must be put into DFU mode. How can you do this? Please follow our simple instructions on how to boot Mac into DFU mode.
• Step 2. Now you can start jailbreaking Mac with the T2 security chip. Please see our guide on how to jailbreak the T2-equipped macOS device.
• Step 3. You get full access to your T2 security chip file system as soon as you finish jailbreaking. Your macOS computer should show a black screen.

  Here is what you must do - launch Terminal. Now SSH into the security chip and enter the following command:

  
  

  Get a new window in Terminal via Command + T shortcut or using this SSH command:

  
  

  If you are asked for your root passcode, enter alpine.Apple T2 security chip files are in read-only mode by default. You can turn them into writable files with the following command:

  
  
• Step 4. Since you wish to change the macOS startup sound, you need to get into the folder, which keeps the boot chimes. Use the following command to proceed:
  It is the next command to use if you wish to get inside the folder with sound files:
  All the files you will see are saved .aiff - this is the Audio Interchange File Format used by Apple on its computers. There are startup sounds and various VoiceOver chimes in multiple languages.
• Step 5. Every Mac with the T2 chip has its startup sound chime turned off. It is a default setting, which you can enable through NVRAM and the following command:
  
• Step 6. Would it be great to copy the available .aiff files and have them converted into mp3 sounds? You can make it happen.Launch a new window in Terminal on a second Mac (Host) computer (do not use a jailbroken device). Use this command:
  Users who hare copied the .aiff files to their folder on Desktop will see this on a local non-jailbroken macOS device:
  Instead of 'checkm8' enter your username or regular name.You can convert .aiff sounds to mp3 online. If you like to use the default startup sound, look for the one 4-second-long file: AXEFIAudio_VoiceOver_Boot.aiff However, if you wish to use a custom chime, you will have to do a couple of things. Firstly, remove this file from a computer:
  Secondly, proceed to the next step.
• Step 7. Search for a 4-second mp3 file with a sound you wish to hear during a macOS startup. Use an online converter to turn mp3 into .aiff format and save this new file to your Desktop folder. You must rename the file into: AXEFIAudio_VoiceOver_Boot.aiffMake sure the name is correct. This way, it will replace the original chime once you copy it to the jailbroken computer using this command:
  Since the computer you have jailbroken (which T2 chip files you have changed) still shows the black screen, let us address this issue. Boot this macOS device using the Power button.If you followed our guide on how to change the macOS startup sound correctly, you would now hear your custom chime.

Afterword. If you ever reboot your computer, the default Apple startup sound will return. But you can use two commands on a jailbroken macOS gadget to turn the custom chime into a permanent boot sound (enter them after Step 6):
1) The first command looks like this:

It will turn into a long string as the macOS snap is named. Example (com.apple.os.update-47B4872F1111CD3A9D9B6F5451673CB47C6F6F13518AF0C5FA3A0198CF1773B8E7B22D9FE42EC0C658715E10E3DFDC43)
2) The second command is like this:

It could turn into something like this:

Now you made the boot startup chime persistent. We hope you enjoy your new custom Mac chime sound.