(usually something like F8, F11, or F12 will bring up the BIOS boot menu). Boot your machine and tell the BIOS to boot off the stick. Put the USB stick in your target machine.

Unzip the SteamOSInstaller.zip file to a blank, FAT32-formatted USB stick (MBR, not GPT).WARNING: there is no easy way to opt out of the beta, you will need to either restore your system partition or wait for 'brewmaster' to catch up to the brewmaster_beta! If you want to opt your machine into brewmaster_beta, you can run this command from a terminal session on the desktop: 'sudo apt-get install steamos-beta-repo' Now when SteamOS checks for updates, you will get the newer packages from the brewmaster_beta repository. Currently we are aiming for a rhythm where brewmaster_beta is updated every Monday and brewmaster gets updated on the first Wednesday of the month. Important security updates or critical bugfixes may get pushed directly to 'brewmaster' if needed. This process is similar to the existing steam/steam_beta process. When the beta stabilizes, those fixes will be promoted to the 'brewmaster' repository.

'brewmaster_beta' is a testing release where fixes and features will gradually accumulate on a daily or weekly basis. Q: How often does SteamOS get updated?SteamOS currently has two different repositories, 'brewmaster' and 'brewmaster_beta'.

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