As far as I know for standard 5400 drives Apple still uses Fujitsu. As is posted above, the 7200s are Hitachi's. If you want to see which one you have, go to , About This Mac, More Info, then find your hd on the device list and locate it's model #. Then just google the model #.Can anyone tell me which ones (brands) apple uses and where we can find out which we have?