PresGas - BackupAtTheMoment1 is a user on octodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
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Hoping most people using #apple #mac is already up to date on this, but it is a big #security issue:
https://arstechnica.com/gadgets/2017/11/new-security-update-fixes-macos-root-bug/
You really should still disable your Guest account and do something with the root account anyway:
