Fall 2008 I purchased 15" Macbook Pro Unibody. 2.53 GHz 4GB RAM 320 GB HD Professional I do a lot of web, graphic, and video editing. Computer is loaded with Adobe CS4 production suite & Final Cut. The hard drive never was over 50% full (used of 2TB external drive). HD crashed, thankfully everything was backed up. I put in a new HD everything was running perfectly. It was faster than before because I went up to a 7200. One day it started lagging during bootup and while working. I though it would be because of the volume of programs (although it didn't happen before) so I put a fresh copy of OSX on. Nothing changed . . . Once a program like FC or Photoshop is open it runs great for 10 min or so freezes for 1 or 2 then back to working and so on. It really seems to hate iPhoto. Any ideas on what to do? p.s. I looked for help on other threads but they were mostly because people had a full HD or not enough ram.