TomTom support supervisor first tell I that I have a defective example so I exchange it . two week and several hour of my time later , I be tell by TomTom support that the problem be that this model be incompatible with Mac computer . who know and frankly I do not care at this point . nothing in TomTom 's manual or Amazon 's sale material to indicate map and firmware can only be download through a pc . I be just irritated that TomTom apparently have a license through Amazon to waste my time . this be the first and last TomTom product for I .