To make my A-800PRO working in Logic, I always have to re-enter the menu "Control Surfaces->Preferences-> MiDI Controllers tab", and tick the box "A800 PRO". However, Logic doesn't seem to save this preference. so I have to restart Logic, and go through this procedure over and over again. When checking the "com.apple.logic.pro.cs" in my user library folder, this file isn't being updated either. I don't know any way to force Logic to update this settings file.