New admin macosx

To change the admin password must open a shell as root. This can easily be done in single-user mode:

Reboot
Hold apple key and S down when you restart
Machine will now directly with user privileges as root, and you write (Note: American keyboard layout):

	 mount-uw /

	 rm / var / db / .AppleSetupDone

	 shutdown-h now 

Restart the computer and a supervisor started. The guide allows you, among other things create a new local admin account. You can then delete the old admin account or give it a new password.