Burn ISO to external volume in Mac

burn.sh

burn_iso () {
  if [[ -z $1 ]] || [[ -z $2 ]]; then
    echo 'usage: burn_iso IDENTIFIER PATH_TO_ISO'
    echo 'hint: you could use `diskutil list` to find out the desired identifier.'
    return
  fi

  # @see http://osxdaily.com/2015/06/05/copy-iso-to-usb-drive-mac-os-x-command/
  # 1. find out the identifier using `diskutil list`

  # 2. unmount the drive
  sudo diskutil umount /dev/$1

  # 3. burn iso
  sudo dd if=$2 of=/dev/r$1 bs=1m
}