Follow the simple instructions below to install the latest version of Chromium OS for SBC on your computer
Now that the file is unziped you can write it to an SD card. You can use an image writer such as win32diskimager to burn the image to the SD card. Win32diskimager can be downloaded from http://sourceforge.net/projects/win32diskimager
Extract the executable from the zip file and run the Win32DiskImagerutility; you may need to run this as administrator. Right-click on the file, and select Run as administrator.
Select the Chromium OS image file you extracted earlier.
Select the drive letter of the SD card in the device box. Be careful to select the correct drive; if you get the wrong one you can destroy the data on your computer's hard disk. If you are using an SD card slot in your computer and can't see the drive in the Win32DiskImager window, try using an external SD adapter.
Click Write and wait for the write to complete.
Exit the imager and eject the SD card.
If you are comfortable with the command line, you can write the image to a SD card without any additional software. Open a terminal, then run:
Identify the disk (not partition) of your SD card e.g. disk4, not disk4s1.
Unmount your SD card by using the disk identifier, to prepare for copying data to it:
diskutil unmountDisk /dev/disk<disk# from diskutil>
where disk is your BSD name e.g. diskutil unmountDisk /dev/disk4
Copy the data to your SD card:
sudo dd bs=1m if=image.img of=/dev/rdisk<disk#
where disk is your BSD name e.g.
sudo dd bs=1m if=2016-03-18-raspbian-jessie.img of=/dev/rdisk4
This will take a few minutes, depending on the image file size. You can check the progress by sending a SIGINFO signal (press Ctrl+T).
This may result in a dd: invalid number '1m' error if you have GNU coreutils installed. In that case, you need to use a block size of1M in the bs= section, as follows:
sudo dd bs=1M if=image.img of=/dev/rdisk<disk#
If this command still fails, try using disk instead of rdisk, for example:
sudo dd bs=1m if=2016-03-18-raspbian-jessie.img of=/dev/disk4
sudo dd bs=1M if=2016-03-18-raspbian-jessie.img of=/dev/disk4