Root user cant be enabled/disabled

…but I couldnt disable it from directory utility screen

What were the exact steps you did and what prevented you from disabling it?

If you couldn't disable it because the menu item to disable it only showed "enable," then the root user isn't enabled.

Hello, this article can help you Enabling and using the "root" user in OS X - Apple Support

An administrator has the rights to enter in root user account ( in case have you exchanged admin account password ) , please change it .

Thanks !

Is the root user logged in?

If the root user is logged in, that may be why it cannot be disabled.

Batuhayabusa wrote:

How can I know if the root user is logged in, or what is the users name ?

And how can I log ıt out then

The root user's name is "root". It is NOT logged in.

Forget about the root user.

In OS X, the root user is disabled by default, and with good reason.

You'd need to take very specific steps to enable it.

Admin users are a completely different thing. You probably are one, since the first account created in a mac is always an admin. There always has to be at least one admin user, but there can be more than one.

Open Terminal and type the following command and hit return.

who

It will list the logged in users.

Batuhayabusa wrote:

myusername console Sep 19 15:22

myusername ttys000 Sep 19 15:34

It returned these, is this normal ?

Perfectly normal - that indicates to me that you have two windows running in Terminal.

Batuhayabusa wrote:

Thank you for your answer, but as I mentioned above the root user is enabled right now, as I can see from Directory Utility, edit screen. It says clearly 'disable root user'. So the root user is enabled right now.

Ok, so it is enabled. I can only suggest that you disable it, since you being an inexperienced user you have no reason for it to be enabled, as far as I can see. I have never enabled it in any of my macs. It is deemed unnecessary, and a potential security risk, as the root user is by definition the lord and master of the machine. If someone were to get root access it could get all the data or wipe out your drive with a single command.

Just click the padlock to unlock it, enter your password as requested and select Disable Root User.

You may try restarting your mac and then immediately try again to disable the root user.

If this does not work: is your mac connected to some network account server (Active Directory or similar), so that people can log in with credentials supplied by a central server? If this a home mac the answer should be "no".

Just in case, look at System Preferences->Users & Groups. If next to "Network Account Server", you see a button labeled "Join" that part is as it should be. If you see something else, let us know.