Our website provided a free download of MacWX 2.5 for Mac. The program is included in Education Tools. The actual developer of this software for Mac is OCENS.
From the developer:
If you are running a Macintosh computer (MacBook, MacBook Pro, Mac Mini, or other) and looking for a weather solution to access weather information on your Mac while at sea - Look no further!
OCENS teamed up with the creators of MacENC / GPSNavX to put together a version of our WeatherNet client for downloading the weather files to your Mac.
You may want to check out more Mac applications, such as UN-SCAN-IT Demo, ScienceMatrix or Enzyme X, which might be related to MacWX.