I have inherited a iMac G5, that's good. The password has been forgotten and the Admin. password lost, that's bad. I've tried: Restarting the computer while holding down the command and s keys at the same time. Typing /sbin/fsck -y. To do a quick check of the hard disk before mounting it. Typing /sbin/mount -wu / for read/write access, also tried Typing /sbin/mount -uw / as an alternative Typing /sbin/SystemStarter" Starting the network services, which is necessary to gain access to NetInfo Typing, passwd root, to override the existing root password with one of my own. But the system has not allowed me to write. I've typed, nidump passwd . However the system does not recognize the command. What can I try?