[CME]

Mavericks works fine for me. But I am trying it out on a back-up hard drive. I never upgrade my main hard drive until everything is officially approved. But nothing wrong with trying it out and seeing for yourself if it works. Just make sure you have a back up plan.

And IMO, and yes it's just an opinion, but if you are serious about doing audio work you should always have a back-up with a known solid configuration.