Lion installation gets stuck after reboot at Apple logo I have a 2006 Macbook Pro with Snow Leopard as the OS X and I recently purchased OS X 10.7 from the App Store.  After download, I began the installation of Lion, it restarted and just remained at the grayish window with the black apple and the black pinwheel.  I left it alone, but after hours, just remained there, no progress
Here are some things you can do (short of reinstalling the OS)


Start in Verbose mode (cc George)
Start with cmd-r using the disk utility to repair disk permissions
Start in Safe mode (hold Shift)  to see if non OS apps are doing that.
Reset your SMC