Sometime it appear to be fine while at times it went up to 96000 Hz! I fixed it back to 48000 Hz sometimes later it shoot up... can anyone tell me how to solve? thanx!
A quick way to reset it is to open then close Garageband. Apple knows about this bug and it's been around for a while but as yet we haven't seen a fix. I'm not sure what exactly causes it and I don't know whether Apple is aware of what exactly is causing it either.