miredo -f -u user
Nov 16 22:34:27 mymac miredo[47898] <Info>: Starting...
Nov 16 22:34:27 mymac miredo[47899] <Error>: Tunneling driver error (/dev/tun*): Undefined error: 0
Nov 16 22:34:27 mymac miredo[47899] <Error>: BSD tunneling interface creation failure
Nov 16 22:34:27 mymac miredo[47899] <Alert>: Miredo setup failure: Cannot create IPv6 tunnel