Installing

You can install GalliumOS in two different ways:

From USB or SD media downloaded from https://galliumos.org or a nightly build from https://ci.galliumos.org/builds
From the commmand line on a ChromeOS virtual terminal, via chrx

Both methods require Developer Mode enabled on your ChromeOS device.

From USB or SD media

Installing from USB or SD media allows you to use your entire SSD for GalliumOS.

Firmware Flashing You may need to flash your firmware. This depends on whether your device came with Seabios (Legacy Boot) or not. For more info see https://johnlewis.ie/custom-chromebook-firmware/rom-download/ and https://github.com/MattDevo/scripts.

Enable Developer Mode
Download the newest ISO from https://ci.galliumos.org/builds (images are available for Haswell, Broadwell, and C710 devices)
Write ISO to your removable USB or SD media using dd or Rufus
1. dd on Linux of Mac OSX
  1. From Linux or ChromeOS: sudo dd if=galliumos.iso of=/dev/sdb bs=1M where galliumos.iso is the iso file you downloaded and /dev/sdb is the usb device you want to write it to
  2. From Mac OSX: sudo dd if=galliumos.iso of=/dev/sdb bs=1m
2. Rufus on Windows
  1. Select the GalliumOS iso, the usb drive you want to use, and then click start.
Insert USB or SD media into Chromebook
Reboot Chromebook and press CTRL+L at the white "OS verification is OFF" screen
Follow GalliumOS installer

Installing from the command line via chrx will give you a dual-boot machine, GalliumOS and ChromeOS.

Note that chrx only works with certain Chromebook models, so be sure to review the hardware compatibility list.

Enable Developer Mode
Reboot Chromebook and press CTRL+D at the white "OS verification is OFF" screen
Configure Wi-Fi if necessary
Press CTRL+ALT+F2 to get a virtual terminal, then log in as user chronos with no password
Run chrx with curl -O https://chrx.org/go && sh go -d galliumos (see chrx.org for more options)
Follow on-screen instructions to repartition your SSD and to install GalliumOS