First of all mister, Apple will tell you whether it has a problem or not, not the other way around. For all we know this is a feature, not a flaw. Apple would never make something that offers a less-than-magical experience. Maybe you are just holding it wrong? I got a lot of replies. It turns out I'm not alone in getting what I've come to know as notification spam. Apparently, it's possible for spammers to email a calendar invite and something (I'm still not completely sure of the mechanism) then puts that invite into the MacOS calendar. According to some of my correspondents, the same thing happens with iOS. I don't use the iOS calendar, either, so I didn't see it in iOS.