Google will not offer installable version of Chrome OS
Starting on June 15th you’ll be able to go out and buy a notebook running Chrome OS. But you won’t be able to download an official Chrome OS build and install it on your own laptop anytime soon.
Google already offers most of the source code for its browser-based operating system, and some developers regularly compile that code and make installable versions avaialble for download. But speaking at the Google I/O developer conference, Google representatives said there are no plans to officially offer an installable version of Chrome OS.
That’s partly because the company is working closely with hardware partners including Acer and Samsung so that the operating system is tied into the notebook firmware. A downloadable, installable version of Chrome OS wouldn’t offer the same security features, for instance.