In the spirit of bringing you more Apple TV-related modifications, we're now gonna show you how to run the full Mac OS X on the Apple TV. semthex from Hackint0sh.org hacked out a replacement to the Mac OS X kernel, side-stepping over certain hardware restrictions that previously made running the Mac OS X on an Apple TV improbable.

Here are the steps to install the full Mac OS X on the Apple TV. Install at your own risk.

1) Remove the drive from the Apple TV
2) Back up your drive! Make an image of it (see the harddrive upgrade tutorial for this)
3) Connect the drive to a regular Mac (use a Firewire or USB drive dock)
4) Install OS X (Intel version) to the drive (we suggest a slim install - no printer drivers etc.)
5) Boot from this drive, and set it up as you would like it. Make sure you do updates so it is at least 10.4.8.
6) Reboot to your normal OS X install.
7) Remove mach_kernel from root of the drive containg the ATV install.
8) Replace it with the customised mach_kernel that youÂ?ll find on Hackint0sh.org.
9) Replace /System/Libary/Coreservices/boot.efiwith the same file from your backup of the Apple TV OS drive (OSBoot partition).
10) Run bless:

bless --folder=/Volumes/OSBoot/System/Library/CoreServices --file=/Volumes/OSBoot/System/Library/CoreServices/boot.efi --setBoot

11) Delete all the Nvidia kexts (all beginning with NVD, there should be 5) from the target drive (in /System/Library/Extensions).
12) Transfer the drive back to the Apple TV
13) Turn the Apple TV on and cross your fingers...

And you should boot up into Mac OS X. The Apple TV running Mac OS X can use the mouse and the keyboard normally. Use either Front Row or Back Row to watch content.

For a more detailed how-to, check the installation video by clicking on the full article link below.