# Disable Mac OS X Lion 10.7 Startup Chime / Sound 

Write a couple of Mute/Unmute shell scripts as outlined below, add them to the login and logout hooks.

[Mute Startup Sound in OS X Lion](http://my.opera.com/mereh/blog/2011/07/30/apple-osx-mute-startup-sound-chime-in-osx-10-7-lion-and-others)

The files *and* the parent directories **must** have the following permissions:

`-rwxr-xr-xowner: rootgroup: wheel`