Installation And Requirements

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WeatherCat version 2.0.0 and later will run on computers running Mac OS X version 10.7.5 or later (Intel only). Older versions that will run on earlier versions of the operating system and PowerPC machines are available from our WeatherCat page.


Please drag the WeatherCat folder to a convenient location on your hard disk (we would suggest your Applications folder).

If you wish WeatherCat's icon to stay in the dock, either drag the application to the dock before running it, or right click on its icon in the dock when running and use the pop-up menu to select 'Keep In Dock'.

You may also wish to add WeatherCat to your 'Login Items' via the 'Accounts' pane of the System Preferences so that WeatherCat starts-up whenever you log-in to your computer. If you have automatic login enabled for the account then WeatherCat will start whenever the computer starts or restarts.

Before running WeatherCat, please ensure you have the correct driver installed for your station or USB to serial converter. Without the correct driver installed, WeatherCat will not be able to communicate with your hardware. Note that USB based stations such as the WMR200 or WH1080/2080/3080 etc. do not need drivers. Also check the date and time is set correctly on your weather station console/hardware and that all sensors are being received correctly.

If you have been running LWC2, WeatherCat will offer to import your data and settings on first run (please check all your settings in WeatherCat after the import, in particular the email 'from' field may have changed).

Finally, please be sure to quit any other weather software before running WeatherCat.

For more information, please see the WeatherCat manual

Upgrading to new version

When you upgrade an installed version of WeatherCat to a new one, follow this procedure:

You do not need to backup your data because WeatherCat automatically does this for you IF the upgrade is going to update the data. If the upgrade does not include updating the data, WeatherCat skips auto backup. It is not necessary to manually backup your data but it will do no harm if it will make you feel better (Tools | Backups | Backup Now).

  1. Shutdown WeatherCat
  2. Move the new WeatherCat files into the WeatherCat folder in Applications
  3. Reboot OS X
  4. Restart WeatherCat

Note: Only when you are upgrading beta versions of WeatherCat (developmental releases rather than full releases) there is an OS X artifact that causes a phantom second Help pulldown menu to appear in the WeatherCat toolbar. This does no harm, but the second Help menu is non-functional. If you quit WeatherCat and restart it again, the errant Help menu goes away. You can read more about this at

Here is a screenshot of the double Help menu toolbar:

Phantom Help Menu.png

Moving WeatherCat from one machine to another

Please see [1]

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