ShutdownSound.zip is used to prevent Mac OS X getting a kernel panic on Shutdown when running on battery power on Acer Aspire One.
This utility is used during the Mac OS X installation guide: Installing OS X on Acer Aspire: The Definitive Guide
This download is provided free and without any guarantee that it will solve your problems. You may however use it as you wish and distribute it freely to your friends and colleagues if it’s of some use.
If however it is useful and does solve your problem, it would be nice if you would link back to this site, leave a comment, follow us on twitter or just say Hi.