That's the thing, though: you need Windows XP or windows. The player otherwise 'works' in any OS - allowing manual mounting and both manual and automatic downloading of files from Finder or iTunes.
But, why have a firmware system that must be updated via Windows XP (of all Windows versions, XP) while the player itself works otherwise? But I wish that were all. The T51 does NOT work with Macs or Linux computers. It stays mounted for very random intervals, automatically unmouting when it wants to. The USB interface isn't stable - that is problem number 1. problem number two is the fact that even Windows users have a hard time uploading.
Forget my other complaints, this player is not well thought-out. Nice hardware coupled to bass ackwards software/firmware update routines and USB implementation a good player do not make.
Again, not a single piece of hardware I own has problems staying mounted in OSX, or in Windows when mounted in OSX from a virtual machine emulator. ONLY the T51 does. No matter the drivers Windows side or the way to perfectly upload in Windows, the T51 is not stable in its host. Eventually, the T51 will unmount in OSX and therefore, Windows.
Installing Windows on my hard disk as a secondary bootcamp OS is a pitiful way to fix this, and dangerous.