Mac OSX 10.4 (Tiger)
Please follow the steps below to format the drive:
Note: If you cannot choose Options because it is grayed out, click on the Current dropdown menu and click on 1 partition. This will make the Options button useable again. Also, if you receive an error saying that the drive cannot be unmounted, shut down the Mac, unplug the drive and turn you Mac back on. After the Mac has fully booted and the desktop loaded connect the drive and try again from Step 1.