How to mute/delete startup sound in Mountain Lion?

Question

Is there a way to shut off/mute the startup sound in Mountain Lion without simply turning down all sounds?  For years I have used a third party pref pane called startup sound, but it has not been updated for OS 10.8.  Thanks.

Answer 1

1. Login as administrator and open Terminal
2. Create scriptfile for muting
sudo nano /path/to/mute-on.sh
3. Enter this as content, when done press Ctrl+O to save and Ctrl+X to exit:
#!/bin/bash
osascript -e 'set volume with output muted'
4. Create scriptfile for unmuting
sudo nano /path/to/mute-off.sh
5. Enter this as content, when done press Ctrl+O to save and Ctrl+X to exit:
#!/bin/bash
osascript -e 'set volume without output muted'
6. Make both files executable:
sudo chmod u+x /path/to/mute-on.sh
sudo chmod u+x /path/to/mute-off.sh
7. Check if any hooks already exist (these will be overwritten, so make sure it is OK for you)
sudo defaults read com.apple.loginwindow LoginHook
sudo defaults read com.apple.loginwindow LogoutHook
8. Add hooks for muting
sudo defaults write com.apple.loginwindow LogoutHook /path/to/mute-on.sh
sudo defaults write com.apple.loginwindow LoginHook /path/to/mute-off.sh