Hi, I have a unibody macbook and I am fairly new to OS X. I have a couple of USB multicard readers, both of which are no longer recognised by the mac. I have tried them on different computers and they both work, and have also tried different memory cards (SDs and Memorystick Pro Duos) none of which are recognised. I know that readers in OS X aren't recognised until a card is inserted. USB Flash drives work fine, as do USB external harddrives and my PSP in USB mode. I have looked on system profiler and the card readers don't show up there either. Any ideas? They are both generic card readers, which rules out manufacturer drivers and both worked fine until recently.