Hi,
I installed the driver on an OSX 10.6 in a PUEL VirtualBox 3.2.8 on Gentoo (32bit).
It works fine but does not recognize headphones if attached. The sound is always played via the MacBookPro's internal speakers (which sucks of course

).
regards
>toaster
UpdateNow it works. It seems to me misconfiguration in the host OS was the cause.
But I have the “one channel only” problem, too.
When balance is centered, the right channel is at 100% (or whatever is the loudest, I get) and the left channel is muted.
When balance is faded to the right, the left channel is between 0 and 100% (depends on the slider's position) and the right channel is muted.
When balance is faded to the left, it's vice versa.