macOS High Sierra Automatically Performs Security Check on EFI Firmware Each Week

Mac users who upgrade to macOS High Sierra will benefit from a significant new security feature that works in the background.
macOS High Sierra automatically checks a Mac's EFI firmware against Apple's database of "known good" data to ensure it hasn't been tampered with, according to a series of tweets from an Apple engineer.The tweets have since been deleted, but a summary remains available on the Mac blog The Eclectic Light Company.The new utility eficheck, located in /usr/libexec/firmwarechec