It is actually a lot easier than you might think.
Important!
This guide is for advanced users only. If you want a simple installer, check lastExile's installer collection.
In case you have an older version of Leopard installed, see the archived copy of this post.
Supported Radeon HD cards:
- Radeon HD 2400
- Radeon HD 2600 Pro, Radeon HD 2600 XT
- Radeon HD 2900 Pro, Radeon HD 2900 XT
- Radeon HD 3850
- Radeon HD 3870
- Radeon HD 3870x2
- Other Radeon HD 2x00/38x0 cards might work as well
- Get Natit (attached to this post)
- Extract the archive and copy Natit.kext to /System/Library/Extensions
- Locate ATIRadeonX2000.kext in /System/Library/Extensions, Open /System/Library/Extensions/ATIRadeonX2000.kext/Contents/Info.plist with the editor of your choice and add the PCI ID of your card (if it is not already in there). Save.
- Only if you have a Radeon 2900 Pro or a Radeon 2900 XT download this
Extract it and copy ATY_Franklin.kext to /System/Library/Extensions/ATINDRV.kext/Contents/PlugIns. - Otherwise skip this step.
- Only if you have a Radeon 2900 Pro or a Radeon 2900 XT download this
- Open Terminal (if you haven't already done so) and type:
cd /System/Library/Extensions sudo chown -R root:wheel * sudo chmod -R 755 * sudo rm /System/Library/Extensions.mkext sudo rm /System/Library/Extensions/Caches/com.apple.kext.info
- You are done. Reboot and pray

If you have problems with white menus, you might want to try one of these files. Starting with 10.5.5 it should not be necessary to install these patches any more.
- If you have a Radeon 2600 Pro or a Radeon 3850 and 10.5.1 download this (white menu fix)
Extract it and replace the original ATIRadeonX2000GLDriver.bundle in /System/Library/Extensions with the one you have just downloaded. - If you have a Radeon 2600 Pro or a Radeon 3850 and 10.5.2 download this (white menu fix)
Extract it and replace the original ATIRadeonX2000GLDriver.bundle in /System/Library/Extensions with the one you have just downloaded.
- It is recommended to perform a clean install. Do not select any graphics-related things during the installation.
- AMD users: you might need a patched OpenGL.framework.
- Radeon HD 2400 users: You do not get DVI support. You have to use a DVI2VGA-converter instead.
- If DVI works, HDMI will work as well (with DVI2HDMI adaptor), no HDMI audio ATM
- AGP versions of these cards require additional patching. I cannot test it and therefore this guide does only apply to the PCI-E versions.
- 2009-03-01: Updated permissions of Natit.
- 2009-02-27: Added new Natit.kext and updated the post.
- 2008-04-03: updated 2900 information, added ATY_Franklin.kext link, added link to FAQ
Please also have a look at this FAQ!



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