The following is an account of my experiences upgrading my Powerbook to the new “Tiger” version of Mac OS X – a long spiel which is probably of very little interest to anybody not likely to be doing the same thing… and probably not of much interest to them!
This turned out to be a very long post and only suitable for those with great stamina, so I’ve moved it into the Comments. Summary for the rest of you: Buy an external firewire drive if you don’t have one, do a complete bootable backup onto it before starting. Then reboot with a system CD and use Disk Utility to verify/repair your disk. Then do the install. Then reboot with the Tiger DVD and ‘Repair permissions’. That’s my recommendation, anyway, and you can read the rest if you want to know the reasoning.