Hi, I know in the pc version you can edit a saved characters specs and then upload it when you're back in the game. Is there any way to do this on the mac version?

I don't own a mac, but on linux the game will export character specs file into ~/.mbwarband/Mount and Blade Warband Characters/<character name>.txt (if you're talking about warband). I guess it works similarly on mac so you might check your home folder (or whatever it is on a mac)