Hello guys,

I know Super User is not a 'tech support' forum, so I will try to make it short: my computer's sound does not work anymore. I have asked for support on the Apple board but I feel a bit on my own. To summarize, the Sound Panel of my iMac does not display any outgoing channel (headphones or internal speakers). It does not work on Windows either.

Contrary to what it may seem, I have the feeling that it is not a hardware issue (and that GarageBand is somehow interfering). If you have an idea to solve the problem, please share.

Making it work again is a lost cause without sending it back to Apple, so the question I'm asking is:

What is the best workaround (cheap Firewire sound card?) for getting my sound back?

Thanks.