System admin appearing on lock screen after stand by

Same problem here, MBP late 2016 with TouchID, two users logged in at the same time (both with FileVault), System Administrator comes up after wake from sleep.

Started to occur after the update to High Sierra.

Highly annoying!!

In my case these option have not been changed since before the High Sierra update and look perfectly fine to me. Yet the problem started right after the update, so I suspect a connection.

It should be noted that there is quite some delay when I click switch user when the System Administrator lock screen shows.

Unfortunately these settings do not help.

Another addition: Logging in with my Apple Watch also does not work. Changing the respective setting (turning Watch login on or off) does not have any influence on the "System Administrator" behaviour.

In security and privacy have you checked the box for show message when screen is locked and if you click on set lock message you can type any word in the window , and when you log out from the account and again login " test " will be shown .

Oh well.

Right after writing the above my MacBook Pro's battery ran empty, system shut down, and after connecting it to power I was greeted with the System Administrator login.

I don't think anymore there is a problem with my system, to me this seems to be a High Sierra bug.

Also, EVERYONE should mitigate this massive bug by setting a custom "root" superuser password immediately. It is not hyperbole to say this is the most severe OS X/macOS privilege error ever. I suspect Apple will also have an official fix out by tomorrow, or perhaps in two days at the latest.

If you think it's even remotely possible for someone to have physical access to your locked, encrypted Mac until Apple releases the official fix, you are vulnerable to complete access unless you set a custom password for "root".

For completeness, let me update: After over two weeks without the System Administrator login screen problem, when I had to reboot, because of a OS crash, the issue is back. Only with the difference that now it's attached to the other account of my two accounts in this computer.

I just meant that originally the problem occurred with my work account when I put my computer to sleep. Now it's occurring only with my private account and not with the work account. Both users are always logged in though.

Ok, I thought in the context of this topic I would have made some sense. But to clarify: the issue I was experiencing, after I upgraded to High Sierra, that when I put my computer to sleep and later woke it up, I was greeted with a login screen of a user named "System Administrator". I needed to click 'switch user' to log in with my own account. This problem occurred only with one of my two accounts in my computer, with my so called work account. When I later rebooted my computer, the system admin login screen problem was suddenly gone and I even wrote about in this 'solution' in this discussion thread. Now more than two weeks later, after a reboot, the same login screen problem came back, but this time with the other of my two accounts in this computer. Goes without saying I would like to get rid of it permanently.

Now more than two weeks later, after a reboot, the same login screen problem came back, but this time with the other of my two accounts in this computer.

Sorry, I misunderstood what you meant by "other." I thought you were describing the Login screen showing Other.

I am having the same problem, which occurred after a recent update. I don’t remember adding root. How would I even check this? I only have two accounts on my MacBook Pro. My wife‘s and mine. Both are admin.

I have this problem also. Just bought a late 2016 15" MacBook Pro with High Sierra. The behavior is as others have described. We have three accounts on this computer. When more than one user is logged in and the system goes to sleep, on waking you are presented with they grey system administrator login. In my case, if you are the most recent user, your password (either touch ID or typed entry) will unlock the system.

For example,

1) I login and use the computer. I finish and computer goes to sleep with me still logged in.

2) My son takes computer and logs in. He finishes, stays logged in, computer goes to sleep.

3) I take computer back and am presented with the System Administrator login. I type my password, doesn't work. I use my fingerprint, doesn't work.

4) My son puts his finger on Touch ID, he is successfully logged back in to his account.

Very annoying, Apple! Please fix!

I have the exact same issue as Axel-F1. I would like to double down on the noted very long delay between switching users. Very un-Mac like behavior. In fact, it is one of the things I tout to Windows users, is showing them how fast a Mac login screen appears and you can log in. I do not have FileVault enabled either, the users are per the expected as in Mike's reply. It has not gone away with the latest updates as of High Sierra 10.13.2.

I am having this problem too.

2016 Macbook Pro 13inch with Touch Bar.

Latest High Sierra - 10.13.3

There are two accounts on my mac - One sys admin, and a standard user. The issue only seems to be happening when the standard user locks the mac (either automatically or by using the lock screen menu option).

Same for me. 2 users who are both admin.

I bought a 3000€ super-high-end laptop and I don't understand how this easy-to-reproduce bug can last for so long without being fixed 😠.

And without any meaningful comment from Apple ?