How to Make a Custom System Alert Sound for Mac OS X

Feb 28, 2016 - 18 Comments

Custom System Audio alert sound in Mac OS X

The Mac makes an alert sound when certain dialog boxes, errors, and other user interactions are encountered in OS X. Most Mac users likely know that you can change the alert sound to one of your choice by going to the Sound preference panel in OS X, but did you know you can easily make a custom alert sound for the Mac as well? That’s what we’re going to demonstrate here, it’s a simple way to customize the Mac experience and doesn’t require any additional software downloads.

We’re going to use the ability to record sound with QuickTime to capture an audio clip recorded from the microphone (or you can record system audio with SoundFlower), trim it down to size, then save it as a compatible system audio file for use with mac OS X. It’s easier than it sounds, follow along.

  1. Open QuickTime Player on the Mac, found in the /Applications/ folder
  2. Pull down the File menu and choose “New Audio Recording”
  3. Create new audio recording

  4. Click the red Record button, capture your audio (make a howl, bang a drum, say hello, get your cat to meow, your dog to bark, whatever) and then stop the recording – system audio is generally best if kept very short, so don’t record yourself defending a thesis for this purpose
  5. Record the sound you want to set as the alert for Mac OS X

  6. Now go to the “Edit” menu and choose “Trim” (or hit Command+T) and drag the yellow sliders to where the audio starts and ends as indicated by the wave, there is usually a second or two to trim off this way
  7. Trim the audio down to fit

  8. Now go to the File menu and choose “Save”
  9. Save the system alert sound

  10. Hit Command+Shift+G to bring up the “Go To Folder” screen at the save dialog, and enter the following path exactly, then click Go:
  11. ~/Library/Sounds/
    Save the alert sound into the system sounds user folder

  12. Give the audio file an appropriate name, the file name becomes the system alert name, then choose “Save” and exit out of QuickTime
  13. Save the file, the name will be the system alert sound

  14. Go pull down the  Apple menu and go to “System Preferences”, then choose the “Sound” preference panel and select the “Sound Effects” tab, find the sound file you just saved in the list and click on it to set the custom audio alert sound effect as your system alert sound in Mac OS X
  15. Use the custom made alert sound in Mac OS X

Now your freshly made custom alert sound will play as the system alert sound in Mac OS X, offering a fun and easy way to personalize the Mac experience a bit.

The video below walks through the process of creating a custom system alert sound in QuickTime and saving it to the proper directory in OS X:

Another neat trick is to create a silent alert sound using the QuickTime method (just record a second of silence and trim it to virtually nothing) and set the screen to flash with an alert, which instead offers a silent but obvious visual option for users who would rather not have a system alert but don’t want to go all out and mute their Mac.

If you’re not into recording your own alert sound, you can get a blast from the past and try out the retro Macintosh System 7 sound effects instead, or add any other .aiff or .aifc file to the user Sounds folder to have them accessible as well. You can access the ~/Library/Sounds/ folder from the Finder in OS X easily with Go To Folder, and it’s also how you can delete or remove the system alert sound(s) you made.

Accessing the user made system alert sounds in Mac OS X

As you can see, QuickTime Player is quite versatile, and it’s really one of the unsung apps bundled in Mac OS X that is so much more than a simple video player. From recording audio clips from the microphone or a sound input as covered here, to recording the Mac screen and recording video of an iPhone screen or iPad screens, QuickTime is more powerful than you may think.


Related articles:

Posted by: Paul Horowitz in Customize, Mac OS, Tips & Tricks


» Comments RSS Feed

  1. Lauder Dale says:

    There is an other way.
    1)Use Your favorite way to create trimmed ( I do not know what is the maximum file size, just use common sense) mp3 or any other format that can be read by iTunes.
    2) Add it to iTunes Library and highlight it in there
    3) Use menu (not a right click) File>Convert>Create AAC version
    4) Right click on the new file and choose ‘Show in Finder’
    5) Change the name from m4a to aifc (ignore/confirm warning)
    6) Copy Your new file to ~/Library/Sounds

    Actually system will see also m4a or m4r files but some applications like Mail will not play them unless the name is changed to aifc.

  2. Mhip says:

    Worked, and it’s in the sound effect pane.
    Is there a way to move that file into the options for mail notification on Sierra?

  3. nadia says:

    Can i change the sound of an ical notification (frog fart) when it pops up on the home screen?

  4. Dick B says:

    I did everything as spelled out in the directions but when I went to Sound Effects my saved sound file was not there.

    Help. Many thanks for your assistance.

    • I_Have_No_Life says:

      Are you sure the file is in aiff or aifc format? If not, you should use an online converter to convert the file into aiff or aifc. Both formats work fine.

  5. JimBob says:

    You can also use Garage Band which I’ve done to import some tunes clips that I trimmed.

  6. joypebble says:

    Thanks for the hint on how to substitute custom sounds for using as the default Alert replacement…BUT…
    how can I get additional custom sounds into other computer functions? (i.e. Toilet Flush for trash removal or shut-down or caps lock, etc?) f

    Is there a way to accomplish that (Just to make housekeeping a little more fun?)



    • Paul says:

      joypebble, I did a bit of digging around and found the Trash sound, along with a few other system sounds, which are located here:


      They are .aif audio files. Be sure to back up your Mac beforehand if you attempt to adjust them, as you could mess something up with CoreAudio. Perhaps in a future article we’ll cover how to change these?

      For anyone wondering, the other system alert sound effects (sosumi, pop, submarine, tink, moof, etc) are located at:


  7. Saul says:

    Great post Paul thanks for this. Do you know if there is anything similar which can be applied to an Ipad?

  8. Marcos says:

    When I attempt to save the audio file I recorded, I am only offered the extension .m4a. If I change the extension by hand (or if I try to export the sound file and change the extension), I get the message: “You cannot save this document with extension “.aifc” at the end of the name. The required extension is “.m4a”.”

    • Mike says:

      This is my problem also. Also I find the Built In alerts in the Mac HD > system/library/sounds folder (where I want to store mine) but they are all .aiff not aifc???

  9. Wharf Xanadu says:

    This is great. I used my dog barking as the sound. Like woof but more realistic. Thanks.

  10. Gianni says:

    I cannot get permissions to drop the sound file into that folder. even when I add my password and change permissions under get info.

    • paul says:

      Gianni, make sure you specify the user folder not the system level folder, the tilde marks the difference:


      Not /Library/Sounds/ (that’s the system folder)

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