Mac - usb tethering an android phone for internet access (osx Mountain lion)

tested on 10.8.2

reference: https://secure.kitserve.org.uk/content/how-usb-tether-android-phone-mac-os-x-computer

summary:
phone to set debug mode:  settings>application>development>debug
mac to create new modem:  system preference>network>advance... >
    model: GPRS (GSM/3G)
    APN: your carrier server, can be found in your phone's mobile network info.