Hi, I'm feeling very stupid about this as I religously keep copies of my passwords away from my computer, but I have forgotten the password for my new Mac Pro (not Macbook pro), and have not kept a record of it. And I can't work out what my very clever clue/hint means. I'm running 10.4.9 and am wondering if the workaround that was suggested in another thread here for a Macbook pro will also work with my computer. I'm new to Mac and am terrified of doing the wrong thing. The workaround, suggested by yeroen was Boot into single user mode by holding down [Apple key] S at startup, then type: passwd your sisters account name at the prompt. This will prompt you for a new password. Once this is reset, reboot the machine normally by simply typing reboot which will bring the system back up in multiuser mode with the graphical login screen, and you're done. I can't believe that I've done this; I always have stand-by's to save me from this sort of thing - if only I had followed my usual method of preserving the password. Thanks for your help.