Simple bash script for Mac OS X to write a disk image to removable media (sd card) or another file, with progress information

write2disk.sh

#!/bin/bash
NUMARGS=2

if [ $# -ne $NUMARGS ]
then
  echo "Usage: `basename $0` </dev/diskN> <file.img>"
  exit
fi

DEVICE="$1"
IMAGE="$2"

diskutil unmountDisk $DEVICE
dd if=$IMAGE bs=1m | pv -ptre $IMAGE | dd of=$DEVICE bs=1m
diskutil eject $DEVICE