Bought this item a little while ago as a Time Machine external drive for my Mac Mini with OSX. Although the drive is firewire, the Mac constently fails to load the drive. Sometimes it is weeks before the drive suddenly pops up and another back-up takes place. I cannot find any reason for it, but a lot of Mac owners also complain on-line about the same thing. So if you have an Apple, give this one a miss and go for an Omega drive.