# How to connect a Geeetech Prusa I3 Pro B to Repetier-Host on mac

My y-axis is running in reverse and slamming into the front of the machine. This is not ideal for my needs.

I need to connect to it with the Repetier-Host software to fix this, and in general. This connects fine via USB, but then says Unknown printer firmw... Waiting for temperature. Sending further commands does nothing as far as I can see.

Does anyone know what I need to install to get this working?