eliminate the Mac power-on sound

readme.txt

Install these scripts to eliminate the Mac boot sound.
These are tested on systems up to Snow Leopard. Not yet
tested on Lion or Mountain Lion.

How to use this:

1. save mute-on.sh, mute-off.sh, and install-boot-muter.sh

2. move the first two into your ~/Library/Scripts directory

   sudo mv mute-{on,off}.sh ~/Library/Scripts/

   (You should get prompted for your password. If you
   aren't an administrator on the computer, you'll get
   prompted for an administrator's userid and password.)

3. make the two mute scripts executable:

   sudo chmod +x Library/Scripts/mute-{on,off}.sh
   
4. Make install-boot-muter.sh executable:

  sudo chmod +x install-boot-muter.sh

5. Run the installer:

   ./install-boot-muter.sh

6. reboot to see if it worked.

install-boot-muter.sh

#!/bin/bash

cd
export myhomepath=`pwd`

sudo defaults write com.apple.loginwindow LoginHook $myhomepath/Library/Scripts/mute-off.sh

sudo defaults write com.apple.loginwindow LogoutHook $myhomepath/Library/Scripts/mute-on.sh

mute-off.sh

#!/bin/bash

osascript -e 'set volume without output muted'

mute-on.sh

#!/bin/bash

osascript -e 'set volume with output muted'