Shell script to change MAC address on OSX

newmac.sh

#!/bin/sh
IFACE=en0
macaddr=`openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//'`
sudo airport -z
osascript -e 'tell application "System Preferences" to quit'
sudo scselect -n
sudo ifconfig $IFACE lladdr $macaddr

# These should match
echo $macaddr
ifconfig $IFACE | grep ether