Derek, we make a weekly TV program, and still use 800mhz G4 Powerbooks running 10.2, attached to FW and USB2.0 disks, for offline editing. Work great, very stable - "If it ain't broke, don't fix it". Patty, the disk will work. If it has FW, then you won't need to do anything but plug it in, and /maybe/ reformat it. If you're running 10.2 or earlier, your Mac likely does not have USB2.0 -- which you will definitely want if you have to use USB. USB1.0 is too slow for editing, and while you can still copy files over USB1.0, it will be painfully slow. We found USB cardbus adapters to put USB2.0 into our Ti-books. Here's link to a long discussion about getting USB2.0 working on older Macs. Sounds like if you have 10.2.8, you will not need drivers... http://answers.google.com/answers/threadview/id/299052.html Can't remember what version of 10.2 we're running, and I'm at home at the moment. Our cards were generic cheapies I picked up here in Tokyo. Derek is right in that older Macs could not use disks larger than 128-130 Gigabytes. That was due to the IDE controllers, in the Mac itself, or the USB/FW to IDE bridge cards used in external drives. If the 1TB drive you looked at is external, then even old Macs will work with the disk. If the 1TB disk is an internal type, you might have to upgrade your IDE card (not possible on iMacs...). You should be able to Google your Mac model and see if it is limited to the smaller disks. Hope that helps. Tim Selander Tokyo, Japan Derek Roff wrote: > --On Friday, February 19, 2010 12:00 PM -0800 Patty wrote: > >> I was in Best Buy today and took a minute to look at some 1TB (and >> larger) drives. Both the ones I looked at said they were for Mac >> OS X v10.3 or later. Does that actually matter if all one wants to >> do is hook it up and transfer files to it? > > I hope no one working with video is still trying to use Mac OS 10.2 > Jaguar or earlier.