Mass Storage 2.5"/3.5"/5.25" Enclosure FireWire Connection: No need to install any additional driver for your system. If you use Mac OS 9.0.X or before ,follows are the result what you can do. Go to the address: http://www.apple.com. to get the "FireWire update V2.7". *** Windows 98 or above does not support IEEE 1394a (FireWire). USB Connection: Please find the correct path for your system inside this disc. Windows ME/XP/2000 doesn't need the driver. There is the Windows 98 driver inside. There are drivers for Mac OS 9.X and OS X also. The driver will be shown whether you put this disc into Macintosh or Windows PC. Please check the "Manual" pdf file before your installation. *** 2.5" Enclosure does not need driver for Mac OS X.