see here:
http://discussions.apple.com/thread.jspa?threadID=1195031&tstart=0 (3/4 way down)
this works!
it seems that ApplicationEnhancer/ShapeShifter might be causing this so if you can, remove these programs before upgrading.
original instructions:
1. Reboot into single-user mode (hold Cmd-S while booting machine)
2. Follow the directions OSX gives you when you get to the prompt (I think these were them - just type the two commands it tells you to):
fsck -fy /
/sbin/mount -uw /
3. Remove the following files:
rm -rf /Library/Preference Panes/Application Enhancer.prefpane
rm -rf /Library/Frameworks/Application Enhancer.framework
rm -rf /System/Library/SystemConfiguration/Application Enhancer.bundle
rm -rf /Library/Preferences/com.unsanity.ape.plist
4. Exit, to continue booting normally
exit
restart
NOTE: some of the paths are different, mine were as follows:
1. Reboot into single-user mode (hold Cmd-S while booting machine)
2. Follow the directions OSX gives you when you get to the prompt (I think these were them - just type the two commands it tells you to):
fsck -fy /
/sbin/mount -uw /
3. Remove the following files:
rm -rf /Library/PreferencePanes/Application Enhancer.prefpane
rm -rf /Library/Frameworks/Application Enhancer.framework
rm -rf /System/Library/SystemConfiguration/Application Enhancer.bundle
rm -rf /Library/Preferences/com.unsanity.ape.plist
4. Exit, to continue booting normally
exit
restart
for those of you not familiar with the command line in order to enter these paths begin typing the line of text and hit Tab to have it complete the current folder name (up to the next /). if you it Tab twice it will tell you the options that are available. Ideally you should be typing in enough of the line that it's the only option to "auto complete" when you hit Tab.
my system is a G4 1.42 mini, 1GB RAM. I attempted an Upgrade.
