This is just a warning for prospective Snow Leopard users. I had recently upgraded to SL on my 2.8 MacBook Pro. I have been a Mac user for 4 or 5 years now so I know the ins and outs, as well as a massive techie for my entire life. The upgrade went smooth and easy with a fresh install of Snow Leopard, updates, software etc. I had been using it for a few weeks when 2 or 3 days ago I began to experience some strange anomalies. I was casually working on my computer when I got the spinning beach ball, and I was forced to force shutdown my laptop. From this point on whenever I started my computer I would get the Apple logo as well as a grey progress bar as if I was doing a firmware update. At first I figured no big deal, I must have downloaded a firmware update by mistake, so I shutdown and restarted into the firmware install mode. Waited this time and let it boot. After another restart the progress bar kept presenting itself all the time and I would have to wait about 15 minutes for my computer to start. I figured I would just wipe my computer and start from scratch using Leopard. However, disk utility could not find my startup volume, I could not perform any first aid function on the drive, I could not wipe it, partition it or restore from an image. I started in single user mode with AppleJack which was also unsuccessful at repairing the drive. I could not boot from any 3rd party dvds such as TechTool or DiskWarrior. When I would try it would lock up. I had even drove to the Genius Bar and they ordered a new HD as they also believed it was fried. Today I decided I would give it another go by starting off my Leopard dvd again. I struggled to figure out what was going on, and suddenly "Macintosh HD" decided to appear. I quickly took advantage of this and wiped the drive, and installed Leopard. At the moment everything is fine, I am running Leopard and not having any problems. No more progress bar or disk errors. I do not know what solved the issue but this is just a heads up to anyone thinking of installing Snow Leopard and is uncertain about the decision. But I must say when it was working, I did love SL I realize this thread is super old, but I just logged in after a very long time to see this. #1 - To the smart ass who said I didn't know what I was talking about. You were wrong. Still using this MacBook Pro and has never needed a repair. #2 - Why was it suspected an an OS issue? Well seeing as it was brand new at the time as was the computer, I'd go ahead and say that was a fair assumption. #3 - Don't feed the trolls. #4 - I never referred to anyone as an idiot.