Mac users interested in Chromium os mac builder generally download:
Work with open-source materials for Chromium projects on your Mac. Select various release channels and check the relevant content according to personal specifications, switch between different builds, etc. Import, export, replace, remove, and otherwise handle data.
ChromiumOS is a lightweight, lightning-fast operating system for your netbook, laptop or even desktop. With the familiar environment of Chromium/Chrome, the entire web is at your fingertips in seconds. With this tool you can build your own application on your mac.