I have a retina iMac with Yosemite and an iPhone 5S too, latest IOS. I have the calendars synched. The iPhone 5 has The weather Channel app as standard, as does the iMac I believe although i can't find any settings for it. Somehow the weather appears daily in both my iMac and iPhone calendars and I can't find how to stop it. There is no Weather App in the list of apps on the iPhone settings, I can't find anything in preferences. How do i stop the Weather update appearing in both my calendars?