How to create a triple boot system (MacOS, Windows, Ubuntu) on a MacBook (MacBook version [4.1).
==Under construction==
==Disclaimer==
Things are a little bit tricky with a Mac. You can obviously mess up your system if something goes wrong. So: ""Please backup your data before you start"" and ""read the instructions carefully.""
This page intentionally explains ""one"" way in a simple and step by step manner.
==Summary==
In short, here's what you do:
Update your MacBook firmware to the latest available version.
- Install rEFIt.
- Create partitions for the three operating systems.
- Install Windows and Ubuntu Linux.
==Step by Step==
===Update your Macbook's Firmware==
Firmware-Updates are distributed as part of OS X Updates, so this part is pretty easy: Boot into OS X, make sure you've got a working Internet connection and click on the Apple-Symbol in the top left corner. Select "Software Update" and install the updates.
===Install rEFIt===
If all goes well, you're going to have three operating systems to chose from at the end of the day, so you'll want to be able to chose which OS to boot into upon startup. You will also want to keep your partition tables in sync. rEFIt does both of these things for you.
See the [http://refit.sourceforge.net/) for more information, and ""make sure you understand the importance of syncing your partition tables"".
To keep things simple: Download the Mac-Disk-Image from the rEFIt site and use that to install rEFIt to your harddrive. Once installed reboot and enjoy the pretty REFIt menu. 
===Create partitions for all three operating systems===
"Note: Tested on a 2008 MacBook running Max OS X 10.5.4."
Instead of using Apple's graphical "Disk Utility", we'll go for the good old command line, so open a Terminal and have a look at your existing disk layout:
diskutil list