without pronterface you can't truly calibrate the Z axis or Filament, i mean you can but it's a headache... for now i would work on trying to get your USB to recognize the printer, and manually level your Xcarraige to the frame so that it is level, which will make bed leveling easier in the future. from there i would level the bed meticulously, and then calibrate e-steps of the extruder.

try reinstalling the mac drivers for the arduino, reinstalling the arduino software, try different USB ports on the mac, and try different cables.

that's a good start