This is a new one for me: My "Early '08" Mac Pro (3,1) runs just fine when it's on, everything works properly. When I shut it down, it starts back up (cold boots) just fine (and with my SSD boot drive, starts up real quick! ). When I try to hot-boot (restart) it however, the machine consistently freezes somewhere in the boot process, forcing me to manually power down the machine and cold boot it. I just ran the update to go from 10.8.2 to 10.8.3. The machine was doing this on 8.2 and continues to do it after the update on 8.3. I could do a clean system install, but I really would rather not. If all else fails I could wipe my boot drive and do a complete reinstall, but I'd REALLY like to avoid that... reinstalling all of the software would be a couple-of-days process. Any ideas?