There is a critical vulnerability the latest version of Apple Mac OS 10.3, or "High Sierra", that allows anyone with physical access to the computer to log in with unlimited access to files and configuration settings without actually entering a password.
If your Mac is running this version of the operating system you should update your system immediately.
- You can check the version of your operating system by clicking on the Apple icon and selecting 'About This Mac'. Version 10.13 or higher, macOS "High Sierra", is affected by this vulnerability.
- Apple provides information on how to patch here: https://support.apple.com/en-us/HT201541
This vulnerability is a good reminder to keep our computers updated with the latest patches available from the manufacturer.