OnyX is one of the most popular maintenance tools for macOS. It's a free utility that offers a wide range of cleaning and optimization options.

With OnyX, you can clear out cache files, run system maintenance tasks, and check the health of your disk. OnyX 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.

Key Features:

• Clears system, user, and application caches
• Verifies the structure of the startup disk and system files
• Runs macOS's built-in periodic maintenance scripts
• Rebuilds system databases and indexes (LaunchServices, Spotlight, and more)
• Uninstalls applications
• Configures hidden parameters for the Finder, Dock, Safari, and other Apple apps
• Displays detailed system and hardware information
• And More

Frequently Asked Questions

Is OnyX free?

Yes. OnyX is completely free and requires no registration. It isn't open-source, but Titanium Software accepts donations if you'd like to support development.

Does OnyX work offline?

Yes. OnyX runs entirely on your Mac and doesn't require an internet connection to perform its maintenance and cleaning tasks.

Is OnyX safe to use?

OnyX is signed by Titanium Software and notarized by Apple, and it doesn't install background processes, adware, or spyware. That said, it exposes many low-level system options, so it's a good idea to back up your data before making significant changes and to stick with tasks you understand.

Which macOS versions does OnyX support?

Titanium Software releases a separate build of OnyX for each major macOS version, so it's important to download the version that matches your installed OS rather than using one built for an older release.

Is OnyX available on the Mac App Store?

No. OnyX is distributed directly from Titanium Software's own website, not through the Mac App Store.