node-spoofmac

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.

Most Macs: en0 is wired, en1 is wireless. Air/retina Pro: en0 is wireless.