How to protect yourself from the massive macOS High Sierra security vulnerability

So your macOS High Sierra-running machine is vulnerable to hackers. Like, really vulnerable. 

Thankfully, there's a simple way to protect yourself — so long as you can follow a seven-step process laid out Tuesday by Apple. 

News broke Nov. 28 on Twitter that an attacker could gain root-user access to an unlocked computer simply by typing "root" into the "User Name" field, leaving the password field blank, and hitting "enter" while in the "Users & Groups" section of "System Preferences."