iMac Startup Problems
At first, upon startup I would get stuck in a "startup loop" which got me as far as the gray screen & the startup chime sound. If I'd shut down via the power button, it would all happen again. Eventually after repeating the procedure a few times the computer would finally start as normal.
Now I get stuck with a black screen & hard drive spinning. What I've found to work is:
Power down via power button
Unplug & hold power for 5 seconds or so
plug in & resart
get stuck in gray screen/chime loop
hold button and power down
do that twice
finally a normal startup
Obviously this is a ridiculous procedure.
I've run disk utility and according to it my drive & permissions are okay.
What now?
Macbook Pro, 15.4" 2.16ghz C2D, 3GB RAM, Mac OS X (10.4.10), Presonus Firebox