This short tutorial describes how to set Notepad++ as default editor for .xml files. Simply register the extension in the app's preferences.

Property lists are essentially XML files with a .plist extension. Here's how to edit them using the command line in the macOS Terminal app.

How do I use the XML Injector? If you aren’t creating mods, all you need to do is put the unzipped files in your Sims 4 Mods folder for it to work with any mod that requires it.