10661 Views 6 Replies Latest reply: Sep 10, 2008 4:32 AM by ChampNou
Welcome to Apple Discussions!
No idea what is going on, but one thing you can try is a Safe Boot.
Hold down the shift key while starting up until you see the words "Safe Boot" in red lettering. It may take a long time because it is checking your entire hard drive for problems. It will bring up the log in screen, turn off your kernel extensions, turn off your fonts, trash the temporary font cache, turn off your log in items, and disable a number of other features. But it will let you get to your desktop where you can look around and see if you can spot the problem. Look especially at the software update that preceded the problem. Also check your log in items--very often software will install itself as a log in item and cause problems.
I am having the exact same problem after an Archive and Install upgrade from 10.4.3 to Leopard. I have an infinite loop (pun intended) at my login screen. I enter my user name, I see a blue screen for a few seconds, and then I go right back to the login screen.
The same thing happens when I boot into safe mode.
Message was edited by: David Bernstein1
Have you worked your way through the 10.5 Troubleshooting article?
Mac OSX 10.5: Troubleshooting installation, startup, and login issues
I did see a reference to a similar problem with an iMac, but not a MBP. If none of the suggestions in the article work, you might try posting your question as a new topic in the Leopard forum. It won't get much attention at the bottom of a solved thread.
If anyone is still having this problem, I solved it by going to the Genius Bar at the Apple Store and having them wipe the computer and reinstall Leopard. Apparently the problem was caused when the computer updated to 10.5.3. Kind of a pain if you have a lot of data on the computer you want to save, but it worked for me since it was the day after i bought it.