I'm attempting to upgrade Mac OS X from 10.7 to 10.8 on my Late 2008/Early 2009 15" Macbook Pro. It's not working. If I perform an upgrade over 10.7 the Mac hangs upon first boot at the gray screen with an Apple logo and no progress wheel. I've left it alone for hours and it goes no further. If I perform a clean install, erasing the drive first, this works. But as soon as I import my Applications and my 10.7 User Account from a backup drive, it fails again with the same symptoms upon reboot. So something is being brought in from my old setup that is causing the failure. I can boot into 10.8 and login into my account in Safe Mode. What can I do from here to pinpoint the cause of my trouble? TIA
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