FAT32 (called MS-DOS (FAT) by Disk Utility a filesystem originally released in 1977 and updated a few times since, lastly in 1996) really is the only cross platform filesystem that is going to work fully out of the box with Windows and Mac OS X.īe careful though, if you are using Disk Utility to format the drive, you should make sure to choose the Master Boot Record partitioning scheme (hit the 'Options.' button below the 'Partition Layout' control on the Partition pane).