These are instructions for how to flash / install Ubuntu Touch on a Galaxy Nexus GSM from Mac OS X. If you brick your Galaxy Nexus by following these instructions, its your fault. Don't do this if you are a noob or never installed a custom ROM. Consider yourself warned. Pre-requisite: Unlock your phone. Google it.

• Download the following files from http://cdimage.ubuntu.com/ubuntu-touch-preview/quantal/mwc-demo: quantal-preinstalled-phablet-armhf.zip, quantal-preinstalled-recovery-armel+maguro.img, and quantal-preinstalled-armel+maguro.zip.
• Download the Android SDK
• Unzip the SDK.
• Open up Terminal.
• cd into adt-bundle-mac-x86_64/sdk/platform-tools
• (Optional: move the above downloaded files into the platform-tools directory or just specify the location of the files below)
• Turn off the phone.
• Boot into bootloader (as in press down both Volume up/down and power for a couple seconds).
• Back in the Terminal, type:

[code]./fastboot flash recovery quantal-preinstalled-recovery-armel+maguro.img[/code] Looks like this installs a version of ClockworkMod Recovery.

• Reboot back into the bootloader by clicking on Volume Up or Down till you see 'Restart bootloader' and clicking on Power.
• Go into Recovery Mode by clicking the Volume Up/Down button a couple of times till you see Recovery Mode. Then click the Power button.
• Back in the Terminal:

[code]./adb push quantal-preinstalled-phablet-armhf.zip /sdcard/0/Download/quantal-preinstalled-phablet-armhf.zip[/code] And then: [code]./adb push quantal-preinstalled-armel+maguro.zip /sdcard/0/Download/quantal-preinstalled-armel+maguro.zip[/code] The sdcard is referring to the internal storage, not a separate SD card (which the Galaxy Nexus doesn't support anyway).

• Select 'install zip from sdcard' (use Volume keys to scroll and Power to select)
• Select 'choose file from sdcard'
• Go into /sdcard/0/Download.
• Select quantal-preinstalled-phablet-armhf.zip.
• Scroll to 'Yes - Install...' and select it. The zip will get installed.
• Select 'choose file from sdcard'
• Go into /sdcard/0/Download.
• Select quantal-preinstalled-armel+maguro.zip.
• Scroll to 'Yes - Install...' and select it. The zip will get installed.
• Select '+++++Go Back+++++' a few times to go back.
• Select 'reboot system now'

Have fun. G+