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If you’re still running Sierra, the release of Catalina is expected to affect you greatly: if Apple sticks to its longstanding policy, that marks the end of security fixes and support for macOS 10.12. I appreciate that your mileage may vary considerably, though. With the exception of one major bug in the scheduling of automatic Time Machine backups, which wasn’t fixed until High Sierra, for a great many Macs and their users it was largely trouble-free.

If you do not have the latest Mac OS, do not upgrade to High Sierra 10.13 or greater until a patch is made available.Sierra has to have been one of the best recent major versions of macOS.A possible fix is to create a root account, then set a password and leave it enabled.The following are recommended actions for those Mas OSX High Sierra 10.13 or greater users: Mac OS's prior to High Sierra 10.13 or greater.Systems with Apple Remote Desktop (ARD) enabled.Systems with local console access, such as shared usage computers in teaching or lab environments, where users of shared computers are not privileged with root access.If a Root User is already enabled, to ensure a blank password is not set, please follow the instructions from the 'Change the root password' section."Ĭurrently, this vulnerability is only detected in users with a Mac OS that has been upgraded to High Sierra 10.13 or greater.

To enable the Root User and set a password, please follow the instructions here. In the meantime, setting a root password prevents unauthorized access to your Mac. Until further notice, Apple has issued the following statement: "We are working on a software update to address this issue.

The update was automatically installed on all systems running the latest version (10.13.1) or greater of Mac OS High Sierra. Update: Apple released a special security update for macOS High Sierra, solving a recently uncovered flaw which would let people gain root access without entering a password. Vulnerability in Mac OSX High Sierra 10.13 and Greater