I have an odd one that I can't figure out. I don't reboot often. I had an Intel X25 SSD, and the boot time was 15 seconds. Fantastic. I decided I was tired of constant space management, and got a WD Scorpio Black 500GB. I restored from Time Machine, and my boot time was around 27 seconds. I can live with that. The last time I rebooted was around a week ago. I just upgraded from a 13" to a 15" MacBook Pro today. As I was getting everything ready to swap the HD from the 13" I noticed the boot time was significantly slower. I clocked it at 40 seconds. Then I swapped the HD from the 13" to the 15", and it is now at 50 seconds. I did a PRAM reset, SMC reset, and repaired disk permissions. I still have 280GB of available space on the HD, so I'm not running low on space. I only have 3 things on my Desktop. In the past week I haven't made any significant changes to the OS that I can think of. Installed a couple things, uninstalled a couple things. Nothings major. Any ideas why my boot time would have gone up so much, and what I can check to try and get it back down? Thanks.