1. Hold [ESC] and [Refresh] buttons and press [Power] button
  2. ignore messages and press Ctrl+D
  3. confirm with [Enter]
  4. press Ctrl+D again (or wait)
  5. reboot takes ~30s
  6. you're now a developer.

There could be provisioning information still left on the device. Log in with an arbitrary Google account, update the system and go to chrome://policy. Load the policies, wait a bit, shut down and try again.

  1. Boot
  2. Ctrl+Alt+T for Terminal.
  3. sudo su
  4. crossystem dev_boot_usb=1 dev_boot_signed_only=0
  5. reboot
  6. hit Ctrl+U
  • MrChromebox – Custom coreboot firmware and firmware utilities for your Chromebook/Chromebox
  • Last modified: 2019-12-20 14:21