This tutorial contains all the info you need in order to learn how to update your Chromebook device to the latest possible Chrome OS firmware even if you are running a very old version.

In case you have blocked the firmware updates on your Chromebook device, or in case you’ve ended up not using your device in the previous months, then your device might not be able to install the latest possible firmware. Also, if your Chromebook device has been connected to a cellular network, then updates won’t be pushed your way, as this is done so that you won’t go over your mobile data limit.

Check the following info on how to enable Chrome OS updates over Cellular Networks:

The obvious way for you to update your device would be over Wi-Fi or using an Ethernet Network, but in case you cannot use any of these, then you should follow the following steps:

  • press CTRL + ALT + T and open a crosh screen
  • next, type update_over_cellular_enable
  • hit the Enter button.
  • now go back to Settings> About Chrome OS and click Check for and apply updates

Below you can find instructions on how to upgrade your Chromebook Chrome OS to the latest possible firmware:

Note that you might be able to update your device if you switch between Beta and Stable channels. Here’s how to do that first:

  • get to Settings menu.
  • click About Chrome OS.
  • Click More Info where the Check for and Apply Updates section is listed.
  • click Change Channel.
    – before doing this note that this process will delete all the data from your device, as it initiates a Powerwash of your device.
  • select Beta, then click Change Channel and Powerwash option.

If this doesn’t fix your problems then you can use the next part of this post and learn how to update your Chromebook successfully.

Before starting the update process via Chrome OS image you will need a formatted USB stick or SD card that has at last 4GB of free space.

How to update Chrome OS to latest firmware possible from very old firmware:

This guide can be used for Chrome OS, Windows and Mac OS computers:

  1. Download the Chromebook Recovery Utility Chrome tool from here.
  2. Launch the Chromebook Recovery Utility Chrome tool.
  3. Click the Get Started option.
  4. Click the “Select a model from a list” option.
  5. Select your Chromebook computer and its correct version.
  6. Click Continue.
  7. Now, insert the USB / SD card into your computer.
    – make sure that it is formatted and empty before starting to copy the files.
  8. Select the correct storage media.
  9. Click Continue.
    – note that all data on the recovery media will be wiped.
  10. Click Create Now
  11. Put the Chromebook in Recovery mode.
    – for devices that are featuring a Recovery button: power the device off, then power it on while holding the Recovery button.
    – for the other models without a Recovery button: press and hold ESC + Refresh and then Hold POWER while the device is powering ON.
  12. Insert the USB stick / SD card.
  13. Follow the on-screen prompt and complete the installation of Chrome OS image.
  14. Remove the USB flash drive when told and your Chromebook will then restart in normal mode.

If you are using a Linux computer to download the files, then you need to follow the next steps in order to download the Chromebook Recovery Tool:

  • download the Chromebook Recovery app from here.
  • edit the script permissions in order to allow execution using the following command line in Terminal window: $ sudo chmod 755
  • run the installer script using root privileges with this command: $ sudo bash
  • follow all the on-screen prompts in order to complete the download.
  • now follow the instructions from Step 11 to 14 – the ones listed in the above tutorial.

These were all the steps that you had to take in order to complete the update of your Chromebook to the latest Chrome OS firmware.