#!/bin/bash

if [[ $# -eq 0 ]]; then
  echo "Adjust Apple Display Brightness by passing +5000 or -5000 (or any range from 0-60000)"
else
  sudo asdcontrol $(sudo asdcontrol --detect /dev/usb/hiddev* | grep ^/dev/usb/hiddev | cut -d: -f1) -- "$1"
fi