Dear Line6, this is unacceptable!
This is the first time I did Mac OSX software update just after a new system release. I regret it. I lost my external sound card capabilities, plus my guitar and midi keyboard become useless... I work in IT/software, so just to add my two cents:
1) you either lack resources or you're aware of the problem and didn't even bother to warn your customers. The new mac osx betas were available long time ago... Never had a chance to test your devices? C'mon!
2) I know that Apple can be a pain, they don't care much about backwards compatibility, but you SHOULD AT LEAST TRY to prepare your devices for the new system.
3) No statement? I found a simple forum sticky to be your response?! IT'S NOT EVEN TIMESTAMPED! It can take weeks to release new drivers and you know it!!!
I restored the sound by using my Time Machine backup... But this is a pretty hardcore solution, as your disk gets erased during the process... you have no guarantee of success and it's 100% "machine" dependent... Still, I blame myself, but how are gonna address people upgrading their macs? They're gonna be sold with new system and still, your gear is not ready it. WAKE UP POEPLE!!