Has anybody had problems with usb keys and Mavericks. I have a bunch of keys that I use within my mac ecosystem. They work on all macs (osx10.6 or higher) except on Mavericks. On mavericks they show up on the sidebar (but with no data in them) and not on the desktop (although the setting is for this to happen). But when I try the key on previous OSX, they work fine. Any input welcome.