I’ve been experimenting with running Linux on Macs for some time and – for a variety of reasons – needed to make a clean install of Ubuntu 14.04 LTS on my early 2008 24″ iMac.The Mac is now on its last legs, and Mac OS does not run very swiftly on it – my aim is to run Ubuntu on it, and use it as a computer for watching TV and DVDs, and for web browsing for guests. Download Ubuntu desktop, Ubuntu Server, Ubuntu for Raspberry Pi and IoT devices, Ubuntu Core and all the Ubuntu flavours. Ubuntu is an open-source software platform that runs everywhere from the PC to the server and the cloud. Download the latest LTS version of Ubuntu, for desktop PCs and laptops. LTS stands for long-term support — which means five years, until April 2025, of free security and maintenance updates, guaranteed. Ubuntu 20.04 LTS release notes. Recommended system requirements: 2 GHz dual core processor or better; 4 GB system memory; 25 GB of free hard. Mac OS X transformation pack is ready for Ubuntu 14.04 Trusty Tahr. Credit also goes to bluedxca93 from gnome-look.org who helped us with fixing several bugs in the themes (checkout his work, and he also accept donations). Following instructions you can completely change look of your Ubuntu 14.04 LTS to look like Mac. DCMLinux is a complete PACS system, free of charge. Its core is an Ubuntu 14.04 system fully updated and it contains the DCM4CHEE as its PACS server. In the near future it will contain many other addons such as Weasis, Oviyam, Care2x, etc. Just download the iso, burn it to a CD and boot it up.
This is intended to be an installation guide for Intel iMac users, as well as a reference for getting various hardware working. At this time, there are 4 major variations of the Intel iMac.
Older information is available in these pages: https://wiki.ubuntu.com/iMacIntelhttps://help.ubuntu.com/community/iMacCoreDuo
If you decide to partition your hard drive and install Ubuntu, please note that resizing your OS X partition to reuse the empty space is not easily done. If you would like to just test out Ubuntu, try using a Virtual Machine such as VirtualBox.
This guide will help you through all the steps necessary for installing Ubuntu on an iMac. This guide was written while Gutsy Gibbon (7.10) was current, with Hardy Heron on the way. However, there should not be too much derivation for any current version of Ubuntu. For any Mac, I would always recommend using the most recent version of Ubuntu that is available since as time passes, more fixes for Mac nuisances are incorporated into the releases.
Triple Booting
This guide will assume that you want to dual-boot OS X with Ubuntu. It is recommended that you keep an install of OS X, even if you do not plan to use it in order to install firmware updates in the future that may be required for your Mac to operate properly. There are many other guides available for Triple (and more) booting with various operating systems. Whether they are for a Macbook, Macbook Pro, or whatever, the partitioning and initial installation process of Ubuntu in the same. The Macbook Pro Wiki Page has an excellent how to for triple-booting. Note that although it mentions Vista, the process should be the same to install Windows XP.
Basic instructions
Here I present my preferred method of installation
NOTE ON INSTALLATION BUG
Due to a bug in the installer, you will likely not be able to boot into your installed system after the installation has finished. This can be corrected by completing the steps at the following post: http://ubuntuforums.org/showthread.php?t=767677
WARNING: For those that have very complicated multi-boot systems (numerous installs of linux and/or windows). This may leave some of your installs unbootable. Please post in the forum to get specialized help with your setup. PLEASE add your comment to this bug report. This is a serious issue and should be addressed. It will not get attention unless it affects a lot of people.
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If you Dual-Boot or Triple-Boot:
WiFi / Airport
You can use a utility called ndiswrapper and an appropriate Windows XP driver to get the card working in Ubuntu. This Windows XP Driver can be found on your Leopard Install DVD (which would normally be used with bootcamp) and in the older BootCamp driver CDs. Additionally, there are some compatible drivers available from Dell. For older iMacs (which the Dell driver will work on), you can follow the steps in the Santa Rosa MacBook wiki page.
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Recently, there have also been issues using ndiswrapper at all. Broadcom released a driver for these cards that will be available in Intrepid 8.10. You can also get it from the backports repository in Hardy Heron 8.04. http://ubuntuforums.org/showthread.php?t=914697
Graphics / VideoCheck 3D acceleration
To make sure your graphics are working properly, we need to make sure that 3D acceleration is working. You can check this with the command:
glxinfo |grep direct You should see in the output 'direct rendering: yes' Intel Graphics![]()
For iMac users with Intel graphics (some early white Intel iMacs), everything should be working out-of-the-box. If you have have any problems, be sure that your xorg.conf is set to use the 'intel' driver rather than the any of the other specialized Intel drivers like 'i810'.
nVidia Graphics
For nVidia graphics, the 2D open-source driver gives you basic support out-of-the-box. If you want to run 3D applications, select System > Hardware Drivers > nVidia accellerated graphics driver (version 185) as recommended. This provides OpenGL support for Compiz.
ATI Graphics
For ATI graphics, you will need to install the proprietary graphics drivers. This can be done with the Driver Manger in System > Adminstration > Driver Manager. When installed correctly, reboot, and an additional check is to run
fglrxinfo The output should tell you that the provider is ATI and not MESA.
If you have issues with the driver in the Ubuntu repos, you can alternately try Envy or even download the driver from ATI's website and install manually.
The default 10.04 ISO won't boot with a compatible driver for 2010 iMacs, so use one of the following solutions:
Sound
If you have an aluminum iMac and you do not have sound :
open /etc/modprobe.d/options : sudo nano /etc/modprobe.d/options and add 'options snd-hda-intel model=imac24' to the file and save ( ctrl+o and ctrl+x to exit ) then reboot. NOTE: The file /etc/modprobe.d/options no longer exists in newer versions of Ubuntu. It is still supported by the kernel, however the filename needs the .conf extension, i.e. /etc/modprobe.d/options.conf would be the file you create to save your options. Actually the filename doesn't matter as long as the .conf extension is used.
Will Tinsdeall (Ubuntu 10.10 - Clean install, 27' iMac Intel i7): Just open a terminal to run 'alsamixer' from the command-line. Ensure 'Front speaker' is turned up and unmuted, using arrow keys and 'M' for mute toggle. (Best to open up Rhythmbox and play some music while doing this, changes are instant)
Eläimen.Varmuus: With Ubuntu 8.10 (amd 64) and iMac rev. early 2008 the first step was enough. I edited only /etc/modprobe.d/options.
Some of the Aluminum iMacs need a patch to get functioning sound. An ubuntuforums user, 'nicfagn' has created many patches and posted them in the forums. Many of the fixes have made it into the latest ALSA driver, so downloading and compiling the latest ALSA source code may work as well. Here is a link to a patch that many have found useful.
Tiziano Faion: If you have an Aluminium Imac setting in /etc/modprobe.d/alsa-base the option model=mbp3 make sound work without patching anything.
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Klaus Doblmann: If your microphone doesn't work (no mic-boost switch), set the model to 'mbp3' instead of 'imac24'.
Jonas Westerlund: If you only get sound from the internal speakers, 'options snd-hda-intel model=mbp3' fixes that at least on the 2008 24' aluminum model.
Matthew Fernandez: For a 2010 iMac you shouldn't need to patch anything. Append 'options snd-hda-intel model=mbp55' to /etc/modprobe.d/alsa-base.conf. Restart. Then enter alsamixer in a terminal window and unmute the Front Speaker channel (left and right arrows to switch channels, up and down to change volume, M to mute and unmute).
Gary Watts: For my 2009 24' iMac, adding 'options snd-hda-intel model=lenovo-sky' to /etc/modprobe.d/imac.conf (or indeed anything.conf) got sound working. Special thanks to zacbarton for his advice at http://ubuntuforums.org/showthread.php?t=1443020
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Warren Harrison: For those unhappy with the audio quality (compared to OS X), install the Pulse Audio Equalizer (http://exploreubuntu.wordpress.com/2010/04/18/equalizer-for-pulse-audio/) and choose the 'laptop' EQ preset. This significantly reduces the mid-range frequencies and brings the audio into closer parity with OS X-native quality.
iMac 27' & ubuntu 11.04
Since kernel 2.6.38, the HD audio model imac27 is available.
The following line must be inserted at the end of the file /etc/modprobe.d/alsa-base.conf
force reload alsa configuration
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then unmute and adjust volume of front speaker and Surround Speaker with the help of :
Seen at http://ubuntuforums.org/showthread.php?t=1043568 and http://www.mjmwired.net/kernel/Documentation/sound/alsa/HD-Audio-Models.txt
iSight
https://help.ubuntu.com/community/AppleiSight
Aluminium keyboard
Users are reporting problems with the aluminium keyboard. The keyboard is still partially functional so long as the keypad on the right is not used. If you have problems with the main keyboard try pressing F6 to turn off num-lock. PLEASE add your comment to the launchpad bug tracker.
Magic Mouse
https://help.ubuntu.com/community/AppleMagicMouse
Compiz
Compiz (Desktop Effects) can be enabled after enabling 3D acceleration by installing the appropriate graphics drivers as shown above.
Working with other OSs
Here are some link to information that may be helpful for those that are dual booting: Mount ext2/3 partitions in OSX
Windows hal.dll error Accessing your OS X partition in Ubuntu Partitioning with the commandline
Let's say you want to resize your OS X partition to 200GB and create a new 200GB Linux partition. Open a terminal and type:
This is the actual tool that Boot Camp would use to resize the partition as well.
Manual Partitioning Tips
The emulated MBR/BIOS compatibility is limited to 4 partitions. This really just means that legacy bootloaders need to reside in those first four partitions (and in the case of windows, everything it needs to access has to be in the first four partitions), but you can customize the MBR partition table to point it to other partitions on your disk.
Triple Boot Guide for 24' iMac
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