How to Easily Bypass macOS High Sierra's Login Screen & Get Root (No Password Hacking Required)
It looks like there is a fatal flaw in the current macOS High Sierra 10.13.1, even straight from the login menu when you first start up the computer. This severe vulnerability lets hackers — or anyone with malicious intentions — do anything they want as root users as long as they have physical access to the computer. Now, this bug is not the be-all and end-all of exploitable bugs, where you can load up a remote terminal and just log into a victim's Mac without leaving the room you're in. Nope. For this exploit, the attacker is going to have to get up close and personal with the victim's... more
from Null Byte « WonderHowTo full article here