How can I reload my Chromebook with a Chrome OS image I have downloaded? You may want to install a version of Chrome OS that is no longer available via the auto update process. You can use the steps below to create a Chromebook recovery drive from a local image you have downloaded.
Insert a USB flash drive or SD card in a Windows or Mac computer, then launch the Google Chrome web browser.
Navigate to the web page https://chrome.google.com/webstore/detail/chromebook-recovery-utili/jndclpdbaamdhonoechobihbbiimdgai , and install the Chromebook Recovery Utility.
Click the Settings icon and select Use local image . Follow the on-screen instructions to create your recovery drive.
Use the instructions in the video below to install the operating system.VIDEO