Build an executable as an Application Bundle on OS X or iOS.
When this property is set to
TRUE the executable when built on OS X
or iOS will be created as an application bundle. This makes it
a GUI executable that can be launched from the Finder. See the
MACOSX_FRAMEWORK_INFO_PLIST target property for information about
creation of the
Info.plist file for the application bundle.
This property is initialized by the value of the variable
CMAKE_MACOSX_BUNDLE if it is set when a target is created.