RE: The Mavica
Hey Macphoria, if I'm correct, that camera uses discs to record it's media, those small 8cm ones? Apple laptops can't use it because of the small disc that the Mavica uses and the fact that the laptops are 'slot loading' which 'grabs' the discs on the sides. You can use it in a desktop because it uses a tray. Hope that helps.
P.S. Come to think of it, the Power G4 has S/D as well and it's tray loading, so technically it should work. and obviously doesn't.