Chromium OS

Chromium OS is an open-source project that aims to build an operating system that provides a fast, simple, and more secure computing experience for people who spend most of their time on the web.

All downloads are located at This will be updated daily where builds compile succcessfully..

Build Instructions for USB

  • Linux
    1. Use p7zip to extract the IMG file from the downloaded file.
    2. At the shell, run the following (where sdX is your USB stick and ChromeOS.img is the path to the IMG file you extracted):
      dd if=ChromeOS.img of=/dev/sdX bs=4M
    3. Boot from USB stick
  • Windows
    1. Use 7zip to extract IMG file from the downloaded file.
    2. Use Win32 Image Writer, then select the IMG file and select the USB device from the menu.
    3. Click on “Write”.
    4. Boot from USB stick

All builds based on x86, amd64 and ARM generic board.

If you want to install to your hard drive, follow the instructions here and here. Heed the warnings noted in the links!

Please note: there is a new behaviour with the chronos user password. The password has been removed from build R55-8777 onward and will continue to be removed for better overall security. Older builds have the password of ‘password’.
This means you need to use ‘chromeos-setdevpasswd’ from either shell or console to set your own password from build R55-8777 onwards.

By default, this also disables SSH access so if you also need this level of access, you will need to set a separate password using ‘sudo passwd chronos’. This allows the password for dev access and SSH access to remain separate if needed.

You can also just set a password using ‘sudo passwd chronos’ and this will allow for both dev and SSH access if you need to keep them the same. Do not use ‘chromeos-setdevpasswd’ if you want to keep the passwords the same.

Once installed, you can update from the Dev Server noted here.

Thanks to The Chromium Projects


2,496 thoughts on “Chromium OS”

  1. I have a UEFI arm tablet that can boot from other USB devices. However there is nothing in the boot partition (/dev/sdb12 or whatever your flash drive is mounted as). I even tried mounting it as root in linux and using the dir command but nothing shows up. So how does the CARM image boot

  2. Hello been trying to make this work over my usb, but no success, tried on my pc desktop and mi macbook pro

    on both cases i choose to boot from usb and i get the GRUB bootloader… next it ask me to choose between
    local image A
    local image B
    verified image A
    verified image B
    Aletrnate USB Boot

    ive tried all of them, but it seems nothings boots and i have to restart the whole pc again.

    Am im doing anyting wrong?
    ive tried the latest version for x64 and then Camd64OS-20190101010101

  3. Is there any version available for Intel core i5 seventh gen with x64 bit processor as all the versions are available for only AMD and ARM operating systems. So please notify with the same as I am eager to use the new Chromium operating system developed the team.Thank You.

  4. Can anyone tell me why my chromebook hates me? Lol im not quite a developer but hoping to be. Im taking some extra coding classes, its been a long time wanted a refresh. But everytime i try to use SSH or the terminal to do just coursework google has a come apart. It shuts me down and logs im untrusted and bunch of crap in system info… Ive currently put my linux course on hold bc of this. Any suggestions?? New to chromebooks…

  5. I am using the latest special driver build of ATB based on chromium v72. The challenge I’m having is that after installing ATB to my HDD, it hangs on the white boot logo screen. If I slam my keyboard 30 to 50 times consecutively, it gets pass the logo screen. Is there some setting that I need to adjust to avoid this manual force login?

  6. I tried the daily build of feb 1 it was not working. I am using acer aspire r3 booting it through usb.

    Can you tell me a version which would work. Also let me know if i can install android apps.

  7. Thank you for your work!

    Does anyone think it is possible to modify chromium OS to support a non-Google authentication ?

    on the chromium site they say:
    We want to ensure that people can fully use Chromium OS without needing a Google login
    While the initial work on the login mechanism has been focused on providing instant access to Google services for users with Google accounts, we are investigating support for OpenID to allow people to fully use the system without needing a Google login.
    End users must already have, or be willing to create, an account that is used to store preferences and settings. Along with Google Accounts, we want to support other authentication systems, particularly OpenID.

  8. Hello, I submitted a post earlier today, if you’ve rec’d it disregard this one.
    I tried 2 different (Camd64OS) image files and 3 usb imagers: balenaEtcher, Rufus and DiskImager. They all imaged fine but my 64bit i7 would hang on ‘Booting the kernel’. It is a Dell Optiplex 9010 i7-3770, do you suppose it requires anything SPECIAL? It runs CloudReady fine but I would really like to get this one going. -Thanks!

      1. Dell OptiPlex 9010 i7 running graphics: Intel HD Graphics 4000. I have imaged the usb with the Feb 1 and also tried Feb 8 and both will hang at loading kernel. The bios was just updated and all other components are up to date.

      2. I have tried the same usb stick on my new Lenovo 110 Touch-15ACL Laptop ideapad laptop and get the same exact result as a user above:

        I get the GRUB bootloader… next it ask me to choose between
        local image A
        local image B
        verified image A
        verified image B
        Aletrnate USB Boot

        I’ve tried all of them, but nothings boots.

  9. Does anyone know how to fix an error I keep getting.

    When I start writing the CARMOS-20190208010101.img using win32 disk image -1.0, I get an error half way through every time, that it cannot read from the device and a load of windows message come up saying I have to format about 5 new partition on the USB and the win32 disk program stops. I removed all partition from the UBS check the size 16gb, so I tried again and the same error comes p half way through (tried on two usb’s now) so thought id try a ‘verify only’ on the qin32 app and i get verification failed at sector: 0 so i assume this is part of the problem?

    My steps:
    I am downloading the .img extracting it to a folder then using win32 disk imager – 1.0 and i am simply clicking write.

    Running on a windows 10 OS

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