Apple has said it is working to fix a serious bug within its Mac operating system.
The bug in MacOS High Sierra, the most recent version gives password free root access by hitting enter a few times.
The bug was discovered by Turkish developer Lemi Ergin. He found that by entering the username "root", leaving the password field blank, and hitting "enter" a few times, he would be granted unrestricted access to the target machine.
Mr Ergin faced criticism for apparently not following responsible disclosure guidelines typically observed by security professionals. However,such a basic lack of security should not have been in there.
North IT suggests creating a password for the root user on your machine, see Apple's documentation here for how to do this.