I HAVE GOOD NEWS!!!!!! First and most important THANK YOU to each and everyone of you who responded with your recommendations, suggestions, ideas, and advise. I read, went through, and tried each one of them so THANK YOU. Late last night I was able to get WeatherCat and my weather station to communicate and up and running on my new mac YA!! However, I honestly could not tell you which one recommendations or suggestions worked and Im sorry about that. I upgraded, I down loaded, I texted, I emailed, I searched the web, I watched videos, I read articles, I went to places on my mac that the average mac user shouldn't go, I deleted and uninstalled, I unplugged, I plugged back in, I restarted, I rebooted, and I did all these things and more several times but some how late last night around 1145 IT WORKED!! and is still up and running this morning. AGAIN THANK YOU!!! Happy Weather Watcher SRS