Deeper is a personalization utility for macOS that you can use to enable and disable the hidden functions of the Finder, Dock, Safari, iTunes/Music, login window, and many Apple applications, and more.

Deeper is a reliable application that provides a clean interface to many tasks that would otherwise require complex commands to be typed using a command-line interface.

There is a specific version of OnyX for each major version of the operating system. Older versions not listed here can be downloaded from the Author link above.