Jim Robertson said: >Since I don't have another drive inside my MacBook Pro, or ANY external >drives, could I install iDefrag on my desktop Mac (which is a dual G5), >power up the MacBook Pro in target disk mode over FireWire, and run iDefrag >on the dual G5? I don't know. Sounds like it might work. I suggest that you ask Coriolus this question.: support at coriolis-systems.com Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) OS X Routine Maintenance http://www.macattorney.com/ts.html