Quick script to change your MAC address

mac_changer.sh

# Make sure the script is run as root
# Otherwise, try to run it with sudo
if [ $EUID -ne 0 ]; then
    echo "This script must be run as root"
    sudo $0
    exit $? # Exit with the same exit code as sudo
fi

# Look for .mac files in the current folder
shopt -s nullglob
macfiles=(*.mac)

# If no .mac files are found, exit
if [ ${#macfiles[@]} -eq 0 ]; then
    echo "No .mac files found"
    exit 1
fi

# If more than one .mac file is found, let the user choose
if [ ${#macfiles[@]} -gt 1 ]; then
    echo "Multiple .mac files found, please choose one:"
    select macfile in "${macfiles[@]}"; do
        break
    done
else
    macfile=${macfiles[0]}
fi

# Read the MAC address from the file
mac=$(cat $macfile)
# Make it lowercase
mac=$(echo $mac | tr '[:upper:]' '[:lower:]')

# Get the current MAC address
current_mac=$(ifconfig en0 | grep ether | awk '{print $2}')

# If the current MAC address is the same as the one in the file, exit
if [ "$mac" == "$current_mac" ]; then
    echo "Current MAC address is already $mac"
    exit 0
fi

# Tell the user what's going on
echo "Changing MAC address from $current_mac to $mac"

# Turn the interface off and on again to disconnect from the network
#ifconfig en0 down
#ifconfig en0 up
# Disassociate from the current network
/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport "en0" -z

# Wait for a bit to make sure the interface is ready
sleep 1

# Change the MAC address
ifconfig en0 ether $mac

# Make sure the change was successful
verify_mac=$(ifconfig en0 | grep ether | awk '{print $2}')
if [ "$mac" != "$verify_mac" ]; then
    echo "Failed to change MAC address"
    exit 1
fi