Typing 'root' as the username, leaving the password field empty, and clicking unlock (once or twice) set up a new account with system admin privileges to the computer.Īccording (Opens in a new window) to security firm Malwarebytes, however, this was not limited only to 'Users & Groups' and could be triggered by clicking the lock icon next to any app within the Systems Preferences menu. Those who clicked the lock icon saw a new login window. Initially, reports indicated that the bug was limited to the 'Users & Groups' option. The hack can be triggered through the Mac's System Preferences application.

Mac computers with High Sierra (MacOS 10.13.1 or higher) have a serious bug that can let anyone gain root access to the system without a password. We are auditing our development processes to help prevent this from happening again.' 'We greatly regret this error and we apologize to all Mac users, both for releasing with this vulnerability and for the concern it has caused. This morning, as of 8 a.m., the update is available for download, and starting later today it will be automatically installed on all systems running the latest version (10.13.1) of macOS High Sierra. 'When our security engineers became aware of the issue Tuesday afternoon, we immediately began working on an update that closes the security hole. 'Security is a top priority for every Apple product, and regrettably we stumbled with this release of macOS. UPDATE 11/29:Apple released a security patch (Opens in a new window) on Wednesday to fix this bug and issued the following statement: The company has issued an advisory (Opens in a new window) that explains in four steps how to fix that issue. UPDATE 11/30: Unfortunately, the patch Apple released may introduce another bug that prevents file-sharing on the Mac.

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