mbox mini 3 pro tools 8 troubleshooting

hey so i have pro tools 8 and wanted to try out this mbox 3 mini i got from a friend before i went out and bought the mbox 3 pro. Anyways, its giving me the standard "unable to locate digidesign hardware..." message. Nonetheless, i researched this issue and subsequently downloaded the drivers. Despite all that my mac isnt recognizing it thru its control message and im getting the sane message