Well, going around in circles a bit. I'm trying to reset my Mac admin. account password (forgotten the original) using the original install disk and it doesn't seem to work. I need to sort this out first! Getting all messed up with keychains which I never bothered with.
On older versions of OS X, its actually quite easy.
Did you try the methods out there that involve booting into single user mode and doing some black screen magic ?
