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Enabling Developer Mode on the Acer Chromebox CXI3

Developer Mode on the Acer Chromebox CXI3 unlocks advanced capabilities for development, testing, and system customization. However, this powerful feature comes with significant security implications and should only be enabled with a clear understanding of the risks involved.

Important Safety Notice

Enabling Developer Mode will:

  • Erase all local data stored on your device
  • Disable core security features that protect against malware
  • Remove verified boot protection
  • Display a warning screen at each startup
  • Potentially void your warranty
  • Increase vulnerability to security threats

Step-by-Step Instructions

  1. Back Up Your Data

    • Save all important files to Google Drive or external storage
    • Make note of any important settings you'll want to restore later

  2. Enter Recovery Mode

    • Power down your Chromebox completely
    • Insert a paperclip or SIM removal tool into the recovery button hole (location varies by model)
    • While pressing the recovery button, power on the Chromebox
    • Keep holding the recovery button until the recovery screen appears

  3. Enter Developer Mode

    • When the recovery screen appears, press Ctrl + D
    • The screen will ask if you want to turn OS verification off
    • Press Enter to confirm
    • Wait while the system prepares for Developer Mode (this can take 15-20 minutes)

  4. Initial Boot Process

    • Once the preparation is complete, the Chromebox will restart
    • You'll see a screen warning that OS verification is OFF
    • Wait 30 seconds for the transition screen to pass, or
    • Press Ctrl + D to bypass the warning immediately

  5. Complete Setup

    • After the boot completes, you'll need to go through the initial setup again
    • Connect to Wi-Fi and sign in with your Google account
    • Developer Mode is now active

  6. Verify Developer Mode

    • Open Chrome browser
    • Press Ctrl + Alt + T to open the Chrome OS terminal (crosh)
    • Type "shell" and press Enter
    • If you get a shell prompt ($), Developer Mode is working

Important Notes

  • Every time you restart your Chromebox, you'll see the OS verification warning
  • You must press Ctrl + D or wait 30 seconds at this screen to continue booting
  • Pressing Space at the warning screen will disable Developer Mode and restore the device to its factory state
  • Keep your device physically secure, as Developer Mode allows unrestricted system access

Additional Security Considerations

  • In Developer Mode, your Acer Chromebox CXI3 is more vulnerable to unauthorized access
  • Local data is not encrypted in the same way as normal mode
  • Be extra cautious when downloading and installing software
  • Avoid using Developer Mode when accessing sensitive information
  • Regularly back up any important data while in Developer Mode