Macbook Pro上的三重启动Windows，Ubuntu和Mac OS X ML（9,1）

完全可以完成三次引导OS X，Windows和Ubuntu。

http://lifehacker.com/5531037/how-to-triple+boot-your-mac-with-windows-and-linux-no-boot-camp-required

安装Mac的rEFIt引导菜单

转到rEFIt的SourceForge页面并下载DMG以获取最新版本的安装程序。打开它并启动安装程序包，然后完成安装过程（这是不言自明的；它将为您完成所有工作）。然后，重新启动计算机以查看其是否正常运行！

使用磁盘实用程序对硬盘进行分区

我们将创建三个新分区；一个用于Windows，一个用于Linux，另一个用于我们的Linux交换空间，Linux在内存不足时使用的空间。为此，只需单击您的Macintosh HD分区。如果已经有多个分区，请单击要从中占用一些空间的分区。接下来，按加号足够的次数，以便共有四个分区。单击第一个新分区（“ Macintosh HD”下的分区），然后在窗口的右侧，在名称框中键入“ WINDOWS”。将此Windows分区格式化为MS-DOS，然后根据需要设置大小。

大小并不重要，只要您的操作系统适合该分区，并且您有足够的额外空间来容纳所需的内容即可。

安装Windows

Insert your Windows installation disk and restart your computer, unless you've already installed it, in which case, move on to installing Ubuntu. As your computer starts up, listen for the familiar Mac startup sound, then immediately press and hold the Option (or "Alt") key on your keyboard, until you see a drive icon with the word rEFIt under it.

Go ahead and navigate through the first few steps of the installation. When you're asked what type of install you want to perform, choose "custom install", so you can pick and format the partition. You'll want to choose the one named WINDOWS (obviously), though you'll have to format it by clicking "drive options" and then "Format". It should reformat that partition to NTFS for you, after which you can hit the next button. It'll take a little while to install, and it'll restart a few times during that process—whenever it does, select the Windows partition on boot (which should show up in rEFIt now, so you won't need to hold option down again).

When it's done and you finally get to the Windows desktop, you can go ahead and install the Boot Camp drivers from your OS X installation DVD. Since your eject key won't work yet, you'll have to eject your Windows disk manually by going into Windows Explorer, clicking on your optical drive, then choosing the "Eject" button in the toolbar. After inserting your OS X installation DVD, it should start automatically with the option to run setup.exe. Pick that, then let the installation run. Once you're done, head back over to OS X, so you can burn and install Ubuntu.

Installing Ubuntu

Download the Ubuntu ISO file and burn it to a DVD or use a USB bootable media application to write the ISO on a USB flash drive. Boot from the DVD or USB. It'll take a few minutes for the Ubuntu bootable media to boot, but you should eventually be presented with the option to try Ubuntu or install it on your computer. Choose install, then go through the first few steps of the process, picking your language, time zone, and keyboard type (USA probably works fine, but I usually pick USA - Macintosh because, you know, that's what I have). When you're presented with the partition window, choose the bottom option to "Specify partitions manually".

Double click on your Linux partition's entry. If you've been following this how-to to the letter, it should be /dev/sda4. You'll be presented with a window in which you manually set the partition's characteristics. I chose to use the partition as Ext4, although you can pick something else if you want—Ext4 seems to be the new standard, so I'd recommend it if you don't know the difference between them all. Check the box to format the partition and make the mount point "/". Hit OK and double click on your partition at the end of the drive, set it to be used as a swap area, and then hit OK. At this point, your window should look something like this:

完成安装的其余部分，直到最后一个可以安装的窗口，并要求您仔细检查所有内容。点击高级按钮。确保选中“安装引导加载程序”，然后将用于安装引导加载程序的设备更改为安装Linux的分区（在上述情况下为/ dev / sda4）。点击下一步，让我们撕裂。完成后，应重新启动计算机，并且rEFIt引导菜单应包含所有三个操作系统的选项。如果您可以成功启动到两个分区，那么恭喜！您的三重启动系统正常运行。

Ubuntu安装完成后，可以通过打开内置的“其他驱动程序”应用程序将计算机重新引导到Ubuntu之后，在Ubuntu中安装驱动程序。