First make sure that your MacBook and your mobile device are on the same Wifi network.
Run Muse Lab and load this config file. This will automatically make MuseLab listen for OSC on UDP port 5000.
In Muse Monitor, go to Settings and enter the local IP of your MacBook. If you’re not sure what this is, on your Mac, open System Preferences and Network. Your local IP Address will probably start with 192, or 10. e.g. “192.168.1.10”, or “10.10.0.10”.
Now just press the stream button in Muse Monitor.