When Hx Stomp is plugged in Macbook Pro via USB I'll get a notice "USB devices disabled - unplug the device using too much power to re-enable USB devices". I reset SMC and PRAM, tried different USB cables, updated OSX, but nothing makes a different. The stomp worked fine with Macbook and I have no idea what is causing this. Other USB devices are working fine. Any ideas how to solve this?