Didn't work for me at first. The interface fails in K8055 at // Open the device for exclusive access err = (*USBInterfaceInterface)->USBInterfaceOpen(USBInterfaceInterface); with kIOReturnExclusiveAccess This is because the "empty" device driver doesn't work. Using this piha/k8055-mac-codeless-kext from github as a no-code driver, the interface app works fine. Anyway, there's no ok error handling if things go wrong, just return statements without closing the device etc. - keep that in mind. A nice starting point for a driver.