Hi,
I have exactly the same issue with OSX Mavericks 10.9 and dolphin 3.0, 3.5 and 4.0 and the latest 4.0-252. The physical Wiimote does't connect then it works on my full AMD (and laggy) PC with Windows 7.
I hope see an update soon :-)
EDIT 11-19-2013 : same issue with the latest release 4.0-282, impossible to connect a real Wiimote with Mavericks (OSX 10.9).
I have exactly the same issue with OSX Mavericks 10.9 and dolphin 3.0, 3.5 and 4.0 and the latest 4.0-252. The physical Wiimote does't connect then it works on my full AMD (and laggy) PC with Windows 7.
I hope see an update soon :-)
EDIT 11-19-2013 : same issue with the latest release 4.0-282, impossible to connect a real Wiimote with Mavericks (OSX 10.9).