I'm posting from Tom's computer.
I've been trying to reboot my computer for 2 hours now.
This has happened before, I'm pretty sure I know what's wrong but I don't know how to fix it.
1. Computer crashed.
2. I restarted it. Computer proceeds through 'grey apple/cog' screen, shows
the 'osx is starting up' screen, then goes directly to a blank blue screen, but still shows a mouse cursor.
3. The computer thinks that a user is still logged in and so won't display the login dialogue that should follow the 'osx is starting up' screen.
4. Previously, I fixed this by asking the computer to start in safe mode. The computer will not boot into safe mode at present. I hold down the shift key, as you do to get safe mode, and the computer proceeds to hang up at the 'grey apple/cog' screen. (This isn't me being impatient, I gave it 1/2 hour this last time.)
5. I can however, boot into single user mode. I fsck'd the disk and it came back clean, so I can only assume that it is still the failure to log out previous user upon crash.
With all that in mind, especially noting that safe mode seems to be inoperable, how would you 'force' the computer to give the login dialogue?
Many thanks and such be upon anyone with ideas.