Mac Air cannot detect PerfectWave MkII

My Mac Air cannot detect the PW MkII when plugged in. I have tried rebooting everything, DAC and Mac, but no luck. I even tried removing the USB, rebooting, then connecting USB last. There is something which may help point to the problem, and that is the small indicator for input, i.e. red for no input and green for input, is on green all the time when USB input is selected from the DAC, even when no USB cable is connected.

Please help. Really frustrating when the DAC sounds so good with CD player to coaxial input. Just want to feed my digital collection through the DAC but can’t.

It’s probably needing a reboot - but it’s best if you let us help you directly. Can you contact our service department for help? You can do it via email or phone.