The company ShipModul website has made a Mac OS X version of the configuration utility MPX-Config configuration utility for the multiplexer Miniplex-2Wi
(¹). It is now available in Downloads section of their website. This utility allows you to make the settings of the multiplexer without going through Windows.
[Update 2/11/2014] MPX-Config V.3.70.0 is compatible with OS 10.10 "Yosemite". He manages the firmware 3.30 and sup. of Miniplex-2Wi. You'll need to connect your Miniplex to a Mac (as Windows PC) with USB cord, after downloading and installing the latest version beforehand, as well as the latest USB driver provided on the ShipModul website (²). You must be connected to the Internet, or in WiFi, either in 3G/4G, in cellular connection sharing if necessary.