Thanks guy, I indeed have usb debug mode on, and is able to use the desktop_sync_1.0_alpha, which doesn't require adb, when using the libusb-win32 driver, but that one doesn't have a functioning mouse and image quality is poor. Now to enable adb, I am now using the Max driver directly sent me by onyx support team, which turned out to be the same as the google SDK driver. But still, 'adb devices', shows nothing, and I have used several different versions of adb.exe as well, including the one shipped with the newest version of Onyx international's desktop_sync_0.3 [which requires ADB].
Should I just give up now and try to use VNC over usb, not sure if it's possible to enable usb tethering on max.