verduron said: >You do not have any recommendation? Norton SpeedDisk seems to be the most OS X-savvy. You can still purchase it as part of Norton Utilities. Norton Utilities (NU) hasn't been discontinued. NU won't be updated for new versions of OS X (e.g. 10.4). Symantec has said that NU will continue to be updated to remain compatible with updates to Panther. http://www.macfixit.com/article.php?story=20040414111904128 If you don't want to go with a defragmentation utility that may not work under OS X 10.4 and later (keep in mind that the other choices may not work under 10.4 either), consider: INTECH SPEED TOOLS http://www.intechusa.com/ TECHTOOL PRO http://www.micromat.com/tt_pro_4/tt_pro_4.html DRIVE 10 http://www.micromat.com/drive_10/drive_10_introduction.html I haven't received enough feedback for any of these to make a recommendation one way or another. I have TTP, and it works, and I have noticed no slowdown from using it, but I can't tell you much about it beyond that. Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) How To Deal With Common OS X 10.3 Panther Problems http://www.macattorney.com/panther.html