Xcode 5 compatible Version of Cocotron
https://github.com/forensix/Cocotron-Xcode-5-Plugin must previously be installed!
Only Foundation was configured. In order to use AppKit etc. add/change the following settings:
OS X Deployment Target —> Compiler Default
Compiler for C/C++/Objective-C —> Cocotron (GCC 4.3.1)
OTHER_C_FLAGS —> -DWINDOWS
Path to Linker Dependency Info File —> Remove
NOTE: NSPropertyListReader is still unusable since Xcode 5 has changed XIB (XML) format!