CeaysXML is a free and open-source library which enables you to automate the connection between your XML documents and your objective-c classes.
In other words, CeasyXML is a static Objective-C library. Unix libraries have a certain way of being loaded, which generates some problems when using Objective-C categories.
CeasyXML uses categories, so that you must specify special linker flags to your own project. This is very simple to perform.
Detailed instructions on how to install and use the CeasyXML utility on your Mac are available HERE.