To connect to Ethernet a Thunderbolt (e.g. Note: if full disk encryption exists, it will necessary to temporarily disable it (takes a while) to make any changes to the partition table. Use MacOS Disk Utility to resize the MacOS partition on the fly, which by default takes up most of the disk, and behind it create a Linux root partition of the size you desire. To bootstrap using Ubuntu, grab a mac image and flash it to a USB drive. I have not tried this yet but you can read about it on the rEFIt website. A single boot installation could be performed, but you will need to use the rEFIt instructions for installing rEFIt to the EFI system partition using bless instead of to the MAC partition (which is the default). These instructions will perform a Dual Boot setup with MacOS.
4.5 Turn off backlight when screen closed.
