OnyX is a multifunction utility that you can use to verify the structure of the system files; run miscellaneous maintenance and cleaning tasks; configure parameters in the Finder, Dock, Safari, and some Apple applications; delete caches; remove certain problematic folders and files; rebuild various databases and indexes; and more.

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

OnyX is Freeware, gratis and freely usable; you may copy and distribute it at will. You can use it for as long a time as you want.

What's New

  • New version developed for macOS Sonoma only

Download notes: Alternatively you can download the latest beta version of this software.

More downloads: