I wanted to talk about a little thing I use sometimes when preparing to give a computer for a buy out or if selling a machine. you can also you this if you have lost the admin password to reset it.

Restart the computer into Single User Mode by pressing Command + S after the gong.

This command will mount the Hard Drive

mount -uw /

Then you use this command to remove the users, remove the network setup and the last part of the command triggers the startup configuration to run again. NOTE: in OS X 10.5 and 10.6 the netinfo section no longer is needed.

rm -rf /Users/ /var/db/netinfo/local.nidb /var/db/.AppleSetupDone

Once your are done run this command to reboot or shutdown.

reboot (or shutdown -h now if you don’t want the machine to turn back on)

Thats pretty much it. If there are other Apple questions anyone has, I am more then happy to go though them