So, i wanted to help my friend to downgrade his 3DS, but he's on 10.6, so the only way for him to get to the homebrew channel is OoTHax, but i can't seem to install the hax. My ideia is to install the hax on the catridge with my 3DS(That has homebrew) and then give him the catridge. But when i try to install the hax, it gives me an error that it can't download the payload. Am i doing something wrong? And what firmware must i choose, the one that my 3DS is on or the firmware that my friends's 3DS is on?