Browsing a few of the other boards and forums over the last few days, I noticed a few people have figured out how to make their Harmon Kardon Soundsticks function under OS X.
Navigate to /System/Library/Extensions/ and either rename (probably safer!) or remove the file AppleScreamerAudio.kext. You will probably have to be root to have permission to change this file. Here's how I'd do it via a terminal session. Comments are in [brackets], so don't type them!
> su [become root; you'll need to enter root password]Restart OS X and your Soundsticks should be working! Since you're disabling a portion of the system software, no guarantees on what else might break. However, others have reported success with no side effects.
> cd /System/Library/Extensions/ [change to the directory]
> mv AppleScreamerAudio.kext AppleScreamerAudio.bak [rename the file]
> exit [ends root session]
> exit [ends terminal session]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20001226160033996