Credit for the original information used in making this how-to goes to TylerL82 over at the SomethingAwful.com forums. Written up here by Jonathan Bare.
So while you have your Apple TV open and you’re installing a new hard drive or just following along with the people over at SomethingAwful.com forums to get Xvid working, you might as well un-break SSH so you can access the Apple TV remotely.
Opening the Apple TV and connecting the hard drive to your Intel Mac are covered in the hard drive upgrade and elsewhere, so we’ll skip those steps and jump right to the point where you have the OSBoot and Media volumes mounted on your Mac.
This process assumes using an Intel Mac because the sshd binary may or may not be the same in the PowerPC version of Mac OS X; we haven’t checked. If someone would like to try using the PowerPC binary and let us know if it works, that would be great!
There are 2 ways to go about this; using the finder, or via the terminal. The finder method is probably best if you aren’t sure what is going on, whereas the Terminal method is quicker if you are confident.
Update: Thanks to reader Epon, we now have a way to do this without requiring iPartition. So you can now do the upgrade for only the price of your new harddrive.
Here it is, a step by step tutorial on upgrading your Apple TV harddrive. With thanks to Jonathan Bare, the brave soul who worked this out!
It should be noted that this process will almost certainly void your Apple TV’s warranty and you are attempting this upgrade at your own risk.
You can do this via the terminal, or by using some applications (which add $100 to the cost of the process).
What you need:
2.5″ hard drive (we used a Western Digital 120 GB WD1200VE drive)
Wiebetech Forensic DriveDock (optional, but recommended) or any 2.5″ to Firewire bridge
Subrosasoft’s CopyCatX ($49), or be comfy with the terminal
Coriolis’s iPartition ($45), or use the Apple Factory Restore
This process was done on an Intel Mac Pro. Connecting the Apple TV drive to a Power PC Mac might damage the GUID partition, especially for anyone who hasn’t upgraded to Mac OS X 10.4.6 or newer.