I've just recieved my HD 2600 XT but it doesn't work. This wasn't surprising because I'm running 10.4.11 on an 'old' MP. I've been told that I need drivers from either the 'alu' Imac or the Leopard. Does anyone know what these drivers are, maybe even e-mail me them? Or any other ideas on what the issues are? Worse case, I'll go out and buy Leopard as I fairly sure from the BareFeats website that the card should work using this.