#START MAC POWERBOOK G4 IN SAFE MODE MAC OS X#

This time all worked as expected.'ДЄs we've discussed several times, problematic USB devices (which function properly in one iteration of Mac OS X but not the next) are some of the most commonly implicated culprits in startup issues after applying a Mac OS X update. Once booted in safe mode, I ran Disc Utility to repair permissions and restarted. It still took a bit longer than usual, but at least I could hear disc activity, so I figured it hadn't stalled. I shut down with the power switch and rebooted into safe mode, which worked. 'This time, on the PowerBook when I restarted after applying the update I got as far as the blue screen with the spinning pinwheel, which rotated for 10-15 minutes but seemed stalled. When updating, I use the suggested procedure to repair permissions using Disc Utility, apply the update, restart, and repair permissions again. Earlier I had updated my Digital Audio G4 desktop with no problem. 'I updated from Mac OS X 10.4.7 on my Titanium PowerBook 400 using the 10.4.8 delta updater. The reason Safe Mode often works to fix instances where startup indefinitely stalls is that in addition to disabling extensions, booting in Safe Mode clears certain caches and performs other maintenance routines that can eliminate problems occurring during startup.

In some cases, as in MacFixIt reader Richard Wolfeiler's, simply booting in Safe Mode once, then restarting normally can resolve the problem(s). Startup problems - simply booting in safe mode, disconnecting USB devices once may resolve Users continue to note issues where startup fails or indefinitely stalls after updating to Mac OS X 10.4.8.

Start mac powerbook g4 in safe mode