Most Chromebooks use Coreboot (coreboot ), although the Google reference devices use a signed binary blob on the CPU. ChromiumOS works with BIOS or UEFI and Grub – in the end it’s a Linux distribution with Chrome browser for a shell.

How do I get to the BIOS on a Chromebook?

Power on the Chromebook and press Ctrl + L to get to the BIOS screen. Press ESC when prompted and you will see 3 drives: the USB 3.0 drive, the live Linux USB drive (I am using Ubuntu) and the eMMC (the Chromebooks internal drive).

How do you update the BIOS on a Chromebook?

Either press Shift Ctrl Alt r or select Settings > About Chrome OS > Powerwash for added security to update your system. Be sure to select the “Update firmware for added security” checkbox during the process.