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Entering Developer Mode on ChromeOS

Developer Mode on ChromeOS unlocks additional capabilities for advanced users, including root access, the ability to install custom firmware, and access to Linux features outside of Crostini. This guide provides general instructions and refers you to the ChromeOS Guide Device Database for device-specific steps.

Important Considerations

Before proceeding, be aware that enabling Developer Mode will erase all data on your ChromeOS device, including data from all user accounts. This includes: - Downloaded files - Installed Linux applications (Crostini) - Android apps and settings - Locally stored data (Google Drive files are unaffected) - Custom configurations

Ensure you back up all important files before proceeding, as this process is irreversible without another full reset.

Finding Device-Specific Instructions

The steps to enter Developer Mode vary slightly depending on your Chromebook's form factor. To get exact instructions for your device, please refer to the ChromeOS Guide Device Database:

➡️ ChromeOS Guide Device Database

General Steps to Enable Developer Mode

Step 1: Enter Recovery Mode

  1. Turn off your Chromebook.
  2. Enter Recovery Mode:
  3. Most Chromebooks: Press and hold Esc + Refresh (F3) and tap the Power button.
  4. Chromeboxes: Unplug the device, press and hold the Recovery Button, then plug the power back in.
  5. Convertible Chromebooks: Some require holding Volume Up + Power instead.
  6. Release all keys when the recovery screen appears.

Step 2: Enable Developer Mode

  1. At the ChromeOS Recovery Screen, press Ctrl + D.
  2. You will see a warning about OS verification. Press Enter to confirm.
  3. ChromeOS will begin transitioning to Developer Mode, which may take several minutes.
  4. Your device will reboot when complete.

Step 3: Set Up Developer Mode

  1. When your Chromebook reboots, you will see the OS verification is OFF screen.
  2. Wait or press Ctrl + D to bypass this screen.
  3. Follow the setup instructions to sign in and configure Developer Mode features.

What to Expect in Developer Mode

  • Every time your Chromebook starts, you will see a warning screen stating OS verification is OFF.
  • Boot times will be slightly longer.
  • Certain security features will be disabled.
  • You will have full root access to the ChromeOS filesystem.

Exiting Developer Mode

If you decide Developer Mode is no longer necessary, follow the steps outlined in Exiting Developer Mode to return to Verified Mode.

By following this guide and referencing the ChromeOS Guide Device Database, you can safely enable Developer Mode on your ChromeOS device while understanding the risks and trade-offs involved.