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macOS High Sierra bug allows anyone root access

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On Tuesday afternoon, Twitter user Lemi Orhan Ergin tweeted one of the biggest Apple software bugs in recent history.

Anyone, anywhere, can login to any computer running macOS High Sierra with root access.

To do so, when presented with an administrator pop-up, just type root in the User Name box. Then hit enter once or twice, and you’ll have root access to that computer. It’s really that easy.

Apple has confirmed to a number of media outlets that they are currently working on a fix for the issue. In the meantime, here’s how you can protect your computer.

  1. Open System Preferences
  2. Click on Users & Groups
  3. Click the lock to make changes (located in the lower left hand corner)
  4. Click on Login Options
  5. Next to Network Account Server, click Join…
  6. Click on Open Directory Utility
  7. Click the lock to make changes (located in the lower left hand corner)
  8. In the Edit menu at the top of the screen, click Change Root Password… (you can change the password to anything)
  9. When you’re finished entering the new password, click OK
  10. Re-lock the locks in the bottom of the Users & Groups and Directory Utility windows

Once you’ve completed those 10 steps, you’re set; your Mac now requires a password to login as a root user.

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