When you are researching various property list settings for applications then you are likely to come across settings that start with kCFPreferences fairly often. When you do then you know that these are preferences for components of an application that are not necessarily unique keys to specific domains. These are constants that have been declared in the CFPreferences.h and apply as indicated here: kCFPreferencesAnyApplication: All Applications kCFPreferencesAnyHost: All Hosts kCFPreferencesAnyUser: All Users kCFPreferencesCurrentApplication: Only the current/defined application kCFPreferencesCurrentHost: Only the current/defined computer kCFPreferencesCurrentUser: Only the current/defined account