Randomize MAC address periodically with spoof-mac (brew install spoof-mac) -- Useful for time-limited wifi hotspots

randomize_mac_periodically.sh

#! /bin/sh
if test $# = 0 ; then
    echo "Usage: $0 <sleep interval like 15m>"
    exit 1
fi

while true
do
    echo "Randomizing MAC now"
    spoof-mac randomize en0
    echo "Randomized. Sleeping for: $@"
    sleep "$@"
done