Just ran software update, Logic won't start.
Seems to be getting hung up on midi drivers.
Restarted several times.
Went to the MOTU site and upgraded.
Still no luck.
MacBook Pro
OS X 10.7.2
Logic Pro 9.1.6
MOTU Ultralite
iPhone 4
Have you by chance installed Pro Tools too? If so maybe http://support.apple.com/kb/TS4151 will help.