There are a lot of different things that we can configure in an Xcode project. As we create different projects, we will look at different aspects of what can be configured. For our SimpleCalc App, we are going to consider which the version of Mac OS X that we want the App to run which icon that we want the App to display.
By default, Xcode will configure our project to run only on the latest version of Mac OS X with the generic App Icon. Sometimes we may want our project to run on an earlier version of Mac OS X. For example, if we want to give our software to someone with an older computer or if we want to put our software in the Mac App store. This setting is called the Mac OS X deployment target.
We will always want to assign an icon to our App so that we can easily identify our App on the Mac desktop. This setting is called the App Icon.