[heavyset_go]

Had this alias for years and it still works:

    alias random-mac='openssl rand -hex 6 | sed '\''s/\(..\)/\1:/g; s/.$//'\'' | xargs sudo ifconfig en0 ether'

[Exuma]

Awesome, so does that change the permanent mac address that comes with the laptop, and it is forever gone? Or does it somehow "reset" when you restart, and you rerun this command multiple times

[heavyset_go]

It resets when you turn the NIC on and off, I believe.