Enable root User in Mac OS X 10.6 Snow Leopard
There are two ways to enable the root super user account in Snow Leopard, the first is probably the quickest. Launch the Terminal and type the following command:
sudo passwd root
You’ll be asked for the admin password, then you’ll have to set a password for the root account. When you’re finished, the root account is now enabled.
The other way is through the GUI, which has changed for Snow Leopard because the “Directory Utility” application moved from the /Applications/Utilities folder to /System/Library/CoreServices
* Navigate to /System/Library/CoreServices
* Unlock the application by entering the admin password and clicking the padlock icon
* Go to the Edit menu and scroll down to “Enable root user”
* Now choose Edit and select “Change Root Password” , and set a password for the root user
* All done! root user is now enabled
Note that enabling the root account can potentially leave your Mac vulnerable to some security attacks, so it’s best to keep disabled unless you know what you’re doing.