# OnyX

> Free maintenance, cleaning and tweaking utility for macOS

OnyX is a free multifunction utility for macOS from Titanium Software. It verifies the startup disk and the structure of its system files, runs cleaning and maintenance tasks, deletes caches, rebuilds databases and indexes, uninstalls applications, and changes hidden settings of the Finder, Dock, Safari and other Apple apps. A separate build is published for each major macOS version, and the developer asks only for optional donations.

- **Category:** Desktop Utilities
- **Made by:** Titanium Software (since 2003)
- **Website:** https://www.titanium-software.fr/en/onyx.html
- **Runs on:** macOS
- **Facts last checked:** Oct 9, 2026

## Pricing

OnyX is free to use.

- **Pricing model:** Free
- **Free plan:** The vendor says all its applications are free and fully usable for as long as you want, with no registration. It calls them donationware; a PayPal donation is optional.
- **Free trial:** None listed.

| Plan | Price | What you get |
| --- | --- | --- |
| OnyX | $0 | The complete utility, including the functions of the vendor's Maintenance, Deeper, CalHash and Schedulizer apps. No registration or license key. |

Read from https://www.titanium-software.fr/en/index.html on Oct 9, 2026. Prices change, so confirm with OnyX before buying.

## Key features

- **System file verification:** Checks the startup disk and the structure of its system files, a job that otherwise means typing commands in Terminal.
- **Maintenance tasks:** Runs miscellaneous maintenance jobs and rebuilds various databases and indexes. The vendor's separate Maintenance app is a subset of this part of OnyX.
- **Cache and file cleaning:** Deletes application, font and system caches and removes certain folders and files that are known to cause problems.
- **Hidden settings:** Turns hidden options on or off in the Finder, Dock, Safari and other Apple applications, the same controls the vendor ships separately as Deeper.
- **Application uninstaller:** Removes an application together with its related files and folders. The 5.1.1 release in progress lists an improved uninstaller.
- **A build for each macOS version:** Version 5.1.0, released on September 15, 2026, targets macOS Golden Gate 27, and older builds stay downloadable for systems back to Mac OS X 10.2.

## Good for

- Mac users who want maintenance and cache cleaning without Terminal commands
- People who want to change hidden Finder, Dock and Safari settings
- Owners of older Macs, since builds exist for many past macOS versions

## Worth knowing

- macOS only. Each major macOS version needs its own OnyX build, and the vendor warns against running a build made for an earlier system.
- The current version, 5.1.0, requires a Mac with Apple silicon on macOS Golden Gate 27; Intel Macs stop at OnyX 5.0.6 for macOS Tahoe 26.
- Builds for earlier macOS versions are discontinued and will not be updated, although they can still be downloaded.
- It is freeware, not open source: the license allows copying and sharing it but not modifying it for distribution.

**Tags:** Disk cleanup, Works offline

## Alternatives

- [CleanMyMac](https://toolgpa.com/tools/cleanmymac): Mac cleanup, malware removal and maintenance in one app. [Compare](https://toolgpa.com/compare/cleanmymac-vs-onyx)
- [AppCleaner](https://toolgpa.com/tools/appcleaner): Small Mac utility that uninstalls apps and their leftover files. [Compare](https://toolgpa.com/compare/appcleaner-vs-onyx)
- [Pearcleaner](https://toolgpa.com/tools/pearcleaner): Free, source-available app uninstaller and cleaner for Mac. [Compare](https://toolgpa.com/compare/onyx-vs-pearcleaner)
- [DaisyDisk](https://toolgpa.com/tools/daisydisk): Visual disk space analyzer and cleanup tool for Mac. [Compare](https://toolgpa.com/compare/daisydisk-vs-onyx)
- [CCleaner](https://toolgpa.com/tools/ccleaner): Junk cleaner and PC optimizer for Windows, Mac and mobile. [Compare](https://toolgpa.com/compare/ccleaner-vs-onyx)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 9, 2026:

- https://www.titanium-software.fr/en/onyx.html
- https://www.titanium-software.fr/en/index.html
- https://www.titanium-software.fr/en/donate.html
- https://www.titanium-software.fr/en/onyx_release.html

Page: https://toolgpa.com/tools/onyx
Listed by ToolGPA (toolgpa.com).