Can't believe I didn't see this on any install guides, forums, FAQ's etc:
IF YOU HAVE A MAC AND YOU FORMAT YOUR SD CARD WITH DISK UTILITY YOU HAVE TO THEN OPEN THE TERMINAL AND RUN THE COMMAND "newfs_msdos -F 16 /dev/yourdiskname" TO MAKE YOUR CARD FAT16.
if you need help look up "newfs_msdos" to learn more about formatting on the mac. Please spread this bit of info!!!!!!!!!
