i today bought a western digital external hard drive called a 'passport' it said on the packet mac compatible and as i specifically wanted one that was usb powered for on the move went for this one. The thing is now i cant get it to be recognised on my mac powerbook, as from further reading it seems it cant recieve enough power from the laptop. i need a power booster cable which western digital only (helpfully) sell in America! The other problem is you can get similar cables but they are 'double headed usb's' to draw enough power to make the hard drive work this is fine as my laptop has two usb ports but on either side of it so the cable doesnt stretch! frustrating! anyone got a solution? do i need a usb adapter and a booster cable!?! Cheers guys.