Google does not provide a standard file for ChromeOS. Instead, official installations for PCs and Macs use ChromeOS Flex , which is delivered via the Chromebook Recovery Utility to create a bootable USB drive. Official Installation Method: ChromeOS Flex

Insert the USB, restart the computer, and select the USB drive from the boot menu. You can choose to "Try it first" or "Install ChromeOS Flex" permanently, which will erase all existing data on your hard drive. 4. Key Differences: ChromeOS vs. ChromeOS Flex