As far as I am concerned the Messages App is one of the best applications on the Mac and iOS. I use it all the time and it is fairly secure. I have covered various features of Messages in the past, but I have never explained how to setup Messages in the Mac and iOS from start to finish. This article does just that. If you are setting up Messages for the first time or setting it up for family or friends, check out the article. It is very thorough and easy to follow.