Q. What is PropertyListEditor?

A. It is an OSX application that makes editing XML based configuration files very easy. You do not really need this application as any text editor will be capable of most edits you might want to make, however if you can be bothered to download it as part of the 300+ Mb DeveloperTools package I recomend it.

Q. What kind of files will it help me fix?

A. There is a special type of configuration file called a PropertyList. They end with the extention ".plist" . A good place to find them would be in the ~/Library/Preferences/ folder. Just double-tap on the plist file and PropertyListEditor should fire up.

Q. How do I use this program?

A. Simply find an XML file that you want to edit. Once the file is loaded, you can navigate around the XML heirarchy and edit any keys you like. Try not to change the structure of the file because you might confuse the application that uses the file. When you have made your changes you can press the Dump button to see what the XML output will look like. Dont foget to save your changes otherwise it will all have been for nothing!