![]() ![]() The first one is the so called EFI partition and the second one is the Mac OS partition. So we've got 2 partitions here already (disk0s1 and disk0s2 in the example). Instead of using Apple's graphical tool, we'll go for the good old command line, so open a Terminal and have a look at your existing disk layout: You may want to have a quick look at the manual page of "diskutil" (type "man diskutil" im a terminal window) just to make sure, you know what you're doing. If anyone gives it a go, please comment here. I don't know if "diskutil" works the same way in previous versions of Mac OS (especially the non-destructive resizing of partitions). Remember that this was done on Mac OS 10.5.4. → Now you're set to boot into multiple available operating systems.Ĭreate Partitions for All Three Operating Systems Once the installation is finished, you can reboot and enjoy the pretty rEFIt menu. To keep things simple you can do this while you're running your normal Mac OS: Download the Mac-Disk-Image from the rEFIt site and use it to install rEFIt to your harddrive. See the rEFIt website ( ) for more information, and make sure you understand the importance of syncing your partition tables. In case you've never heard of "keeping partition tables in sync", just note that so called "GPT/MBR hybrid" partition table is needed to make all three operating systems happy. You will also want to keep your partition tables in sync. 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. Select "Software Update" and install the updates. 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. This is just to make sure that you're running the latest available firmware. Create partitions for the three operating systems.Update your MacBook firmware to the latest available version. If you run into trouble have a look at the following page that gives a lot more detail: This page intentionally explains one way in a (hopefully) simple and step by step manner. So: Please backup your data before you start and read the instructions carefully. You can obviously mess up your system if something goes wrong. Things are a little bit tricky with a Mac. Note: This was created using a 2008 MacBook running Max OS X 10.5.4, Windows XP SP3 and Ubuntu 8.04.1. How to create a triple boot system (MacOS, Windows, Ubuntu) on a MacBook. Create Partitions for All Three Operating Systems.Note: On newer Macs you might have to install an EFI boot manager to boot from USB. Restart your Mac and hold down Alt while the Mac is restarting to choose the USB stick.Run diskutil eject /dev/diskN and remove your flash media when the command completes.Start Disk Utility.app and unmount (don't eject) the drive. If you see the error dd: /dev/diskN: Resource busy, make sure the disk is not in use.Use the same command but replace bs=1m with bs=1M. If you see the error dd: Invalid number '1m', you are using GNU dd.Using /dev/rdisk instead of /dev/disk may be faster.Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m (replace /path/to/downloaded.img with the path where the image file is located for example.Run diskutil unmountDisk /dev/diskN (replace N with the disk number from the last command in the previous example, N would be 2).Run diskutil list again and determine the device node assigned to your flash media (e.g.Run diskutil list to get the current list of devices.dmg extension as necessary, mv ~/path/to/target.img dmg ending on the output file automatically. img using the convert option of hdiutil (e.g., hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/ubuntu.iso) Open the Terminal (in /Applications/Utilities/ or query Terminal in Spotlight).Directly from the How to install Ubuntu on MacBook using USB Stick page ![]()
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