A very quick port of https://github.com/feross/SpoofMAC/ for OSX to Node.js.
$ npm install -g spoofmac $ sudo spoofmac en0 Using random MAC address. MAC address for en0 9b Changed en0 (h/w: 31) from 9b to 53. If both addresses are the same, run 'ifconfig en0 | grep ether' in a few seconds.
en0 is wired,
en1 is wireless.
en0 is wireless.