Updating Custom Firmware


The script does not work on Windows. If you are using Windows, boot a live Linux iso, such as Ubuntu or Fedora, and run the script from there.


curl is not installed by default for Ubuntu / Ubuntu distros. To install it, run: sudo apt update && sudo apt install -y curl

  1. Run MrChromebox's firmware utility scriptopen in new window.
    • In case you forgot, type cd; curl -LO mrchromebox.tech/firmware-util.sh && sudo bash firmware-util.sh and press Enter.
  2. Choose option 1: Install/Update UEFI (Full ROM) Firmware, and reboot if successful.


Do not reboot if flash was not successful

Last Updated: