1. Install rEFIt Download and mount the rEFIt-0.14.dmg disk image. Double-click on the “rEFIt.mpkg” package. Follow the instructions and select your Mac OS X installation volume as the destination volume for the install. If everything went well, you’ll see the rEFIt boot menu on the next restart. If you run into any problems, you can find more details on their website.
2. GPT fdisk is a disk partitioning tool loosely modeled on Linux fdisk, but used for modifying GUID Partition Table (GPT) disks. The related FixParts utility fixes some common problems on Master Boot Record (MBR) disks.
3. Click on Downloads. Double-click on rEFIt-0.14.dmg (in the Finder window, not the browser window). Double-click on rEFIt.mpkg. Type root password. See 'The installation was successful.' Push the Mute button (F10). (This will stop the system from making noise on each reboot.).
4. Click on Downloads. Double-click on rEFIt-0.14.dmg (in the Finder window, not the browser window). Double-click on rEFIt.mpkg.
5. Download rEFIt for free. Boot menu and maintenance toolkit for EFI-based machines. REFIt is a boot menu and maintenance toolkit for EFI-based machines like the Intel Macs.
6. The current release is 0.14. It is available in various forms. Both disk image distributions include the Installer package and can be burned as a bootable CD as well. All three binary distributions can be used to install rEFIt on a USB memory stick or other disk drives. rEFIt 0.14 http://downloads.sourceforge.net/refit/rEFIt-0.14.dmg?usemirror.

Here is a quick and concise set of instructions on how to install Ubuntu 13.10 on a 27″ iMac from mid 2010.

REFIt-0.14.dmg (첨부파일) 설치하는 이유는 부프캠프를 이용해서 윈도우를 설치하는 것이 아니고 리눅스를 설치 위함입니다.

I. Create a Partition for Ubuntu

Open up ‘Disk Utility’ on your iMac.

Select your hard-drive from the list of drives on the left side of the window; then select the ‘Partition’ tab to see how the hard-drive is currently partitioned.

Click on the Macintosh HD partition and ‘shrink’ the partition by the amount of space you would like to give to your new Ubuntu installation. Ubuntu needs about 5 GB of space just for the installation. I’d recommend at least 40GB total but you can probably get by with less depending on what you are going to do with the install.

Press apply once you have your desired values.

NOTE: if your disk is encrypted, you will have to decrypt the disk before shrinking the partition.

II. Download Software

Here is a list of software you will have to download.

1. rEFInd Boot Loader (version 0.14 as of 12/23/2013) [link]
2. Ubuntu 13.10 ISO (64-bit) [link]

III. Installing rEFInd Boot Loader

If you downloaded the rEFIt-0.14.dmg disk image for OSX, you simply have to double-click on the rEFIt.mpkg package from the disk image and follow the install wizard.

Make sure you select the MacOS X installation volume as the destination.

IV. Installing Ubuntu 13.10

It is highly recommended (by Ubuntu) to install Ubuntu by burning the Ubuntu 13.10 ISO to a CD or DVD and booting from the disk.

If you would like to install Ubuntu from a USB Stick, you can follow the instructions link here.

1. Burn the ISO to disk.
2. Keep the disk inserted in your computer.
3. Hard shutdown your computer.
4. Restart your computer while holding down the ‘c’ button. Do not release the ‘c’ button until you see the computer boot into the Ubuntu disk.

Follow the installation instructions. Make sure you select ‘Install Ubuntu’ from the first menu (not ‘Try Ubuntu without installing’ selected by default).

3rd Party Software

Along the installation instuctions, you will be asked whether to install 3rd party software for network drivers and MP3 software. Check this box.

Installation Type

When asked about the installation type, make sure you choose ‘Install Ubuntu alongside them’ to install Ubuntu next to your OSX installation (and/or Windows bootcamp installation).

Wireless Keyboard

If you have a wireless bluetooth keyboard, chances are it will not be functional when installing Ubuntu. You can turn on the On-Screen keyboard from the Accessibility menu from the top-right corner to use.

V. Restart

When the installation is complete, your computer will restart.

When your computer restarts, it should boot up with the new boot loader menu (rEFId). Select the Linux boot partition and boot into your Ubuntu install for the first time!

VI. Apple Wireless Keyboard Setup

The Apple wireless keyboard will not work with a vanilla install, even if you successfully pair the keyboard via bluetooth to the machine (using only your mouse to navigate).

To get started with setting up your keyboard, make sure to turn on the On-Screen keyboard (if it is not already turned on).

To turn on the On-Screen-Keyboard, go to
System Settings -> Universal Access -> ‘Typing’ tab -> On Screen Keyboard and switch it on.

Log out and log back in if the keyboard does not show up.

Update and Upgrade Software Repository

Go to the console and type in the following command (using the On Screen Keyboard):

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sudo apt-get update && sudo apt-get upgrade

This command will update your local software source list is up to date AND will update all your existing software to their latest versions. You can leave out the second half of the command (&& sudo apt-get upgrade) if you do not wish to upgrade any of the installed software at this time.

Reinstall Bluetooth software

Uninstall software with the following command.

sudo apt-get purge bluez blueman gnome-bluetooth bluez-utils

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Then reinstall using the following command.

sudo apt-get install bluez gnome-bluetooth

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Afterwards, go to system settings and attempt to pair your bluetooth keyboard.

I’ve personally had to try this several times in order to get it to work properly. If anyone else has a different set of sets to setup the wireless keyboard, please let me know.