PrefEdit is designed for both software developers and advanced end-users who need granular control over system and application settings:

While PrefEdit has been a staple for Mac power users since the early days of Mac OS X, the 4.51 update introduced critical stability and usability enhancements:

Because PrefEdit allows for the modification of critical system and application settings, it should be used with caution. Inappropriate values can lead to system malfunctions or data loss. The Preference System of macOS

: Introduced a feature to open "substitute copies" of files that contain proprietary or invalid value types. These unknown types are replaced by descriptive strings, making it easier to analyze non-standard plist-like files.