Problem - Tethered Boot with another PC/Mac

Hello,
I have even a question: I have an Apple TV2 jailbroken with the current version 0.97. Now the Apple TV2 has ios6.2.1 so that I can start only with Tethered boot the Apple TV. With my Macbook (El Capitain) everything perfect. :-)
Now I have given this my friend and he has only Yosemite on MAC. He is not getting booted the Apple TV. 2 What he has to do, so that it can boot the Apple TV? I can not always go with my him.
Regards
Andi

The ATV needs to be jailbroken on the computer that will tether it. There is no way around it.

Hello,
Thanks for the answer. I thought it is possible also another computer to start the ATV. What do I do if the PC is broken and I have to buy a new one? The jailbtreak remake?

It will have to be jailbroken on the computer that will tether it… one nearby or a laptop.

I tried once to just copy the files between computers and it just didn’t work. There is a discussion of this from about three years ago but I cant find that post.