The NSUserDefaults object relies on the user’s defaults database to persist the defaults that are written to it. The database itself is persisted as .plist files in ~/Library/Preferences. You can open this folder in Finder by using Go → Go to Folder... and entering the path. These files are binary plists; you can view their contents in Xcode.
Each application’s preferences are stored in a file using its
bundle identifier as the base name.
SpeakLine’s bundle identifier is
unless you used a different organization identifier or project name
when you created the application in Chapter 6.
In older versions of OS X you could edit these files directly, but in OS X Mavericks ...