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When you boot up your Chromebook, it will begin with a warning screen noting that “OS verification is OFF”. You will be prompted with an opportunity to “turn OS verification OFF”. On most Chromebooks, you do so by turning the device off, then holding down the ESC and Refresh keys while you press the Power button. To get to Developer Mode, we need to first reboot into Recovery Mode. The use of Developer Mode may void your Chromebook’s warranty. This could include important data like any files you’ve downloaded, or locally cached passwords.
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Since ChromeOS is an online-centric operating system, the vast majority of your data will be stored remotely, but make sure you’ve backed up everything important that’s local to your machine before you begin. Placing your device into Developer Mode will wipe all data and user information from it.
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