Sorry, if that was not clear; the point is, that if you update to 10.6.6, the speaker system may work for you! This simple step has proved successful for others, including myself.
Do you do regular OS X maintenance, using something like Onyx, Macaroni, etc? See too: MacKeeper, & at: MacUpdate.com.
Many of the experts say to Download the 10.6.6
_Combo_ update from Apple, & Not use the Software Update feature for OS updates: see here:
http://support.apple.com/kb/DL1349
Next, although, it may sound tedious, many Mac sites suggest following these steps for a successful OS update:
-Back Up, Back Up, Back Up
You can choose to Back-up all your data to a Firewire external Hard Drive by using SuperDuper, see here:
http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html
This way you have a bootable clone of your iMac, rather than one you have to re-build, step by step, via Time Machine. There are several good choices at OWC Mac Sales:
http://www.macsales.com
With a bootable external HD you have the ability to start up from it, should anything go wrong with the internal HD on the iMac!
Or, my favorite external HD, choice is the Newer Tech mini-stack, because it gives you more USB & Firewire ports:
http://www.newertech.com/products/externalhd.php
You can also choose to use Cloud storage, which, is offered by various companies, see this:
http://www.google.com/search?client=safari&rls=en&q=cloudstorage+forMac&ie=UTF-8&oe=UTF-8
Many people also burn a couple of discs of their most important data, and put the discs in a safe place, like a safe deposit box.
Then:
- Eject external HD & other drives
- Disconnect all your peripherals: printer, external HD, speaker systems, iPod etc.
- Clear your desktop of clutter
- Turn off all apps
- Run the installer
- Re-Start the iMac after installing anything, and then, Repair Permissions via the Disk Utility. No need to Verify Permissions, first. Some may tell you this is old school, but I've found that it helps to keep things sorted, properly.
Let us know if that worked for you.