Hi, Steve. There is a workaround for Maverick's USB driver issue. If you use a powered USB hub between the Mac and OffRamp or other device using a M2Tech driver (HiFace, ADL GT40, etc.), the problem is solved. However, I can't vouch for any possible degradation in sound. At least there is a way to make a little music while we are waiting for the inevitable patches and upgraded drivers

Best.
Tim