Model View Controller is the defining architecture for development in OS X and iOS but it is often given the "you should already know this" treatment. It is one of the basic best practices in modern software development. Doing it right can give you a well-structured and easily testable app; doing it wrong can give you a big ball of mud that can give you late ship dates and unhappy users.
This meetup will go into MVC in depth, with a working app to help give it context and meaning.
This app will be our own homegrown weather app utilizing either openweathermap.org or api.wunderground.com.