# OnyX

A free, all-in-one Mac maintenance utility — verify system files, clear caches, uninstall apps, and tweak hidden settings — from French developer Titanium Software, since 2003.

- **Category:** [Utilities](https://notchlist.vercel.app/category/utilities/)
- **Price:** Free
- **Open source:** no
- **Official site:** https://www.titanium-software.fr/en/onyx.html
- **Available via:** Homebrew, Direct
- **Requirements:** A version-specific build per macOS release — the current OnyX 5.0.2 needs macOS Tahoe 26, Apple Silicon or Intel. Older builds are maintained back to Mac OS X 10.2.
- **Maker:** Titanium Software

## Kitsmith's take

One utility for a long list of maintenance tasks that would otherwise mean typing Terminal commands: verify the startup disk and system file structure, clear caches, uninstall applications, rebuild indexes and databases, and configure hidden preferences in the Finder, Dock, Safari, and other Apple apps. Titanium Software has built and given it away free since 2003, donation-supported. Each macOS version gets its own matching OnyX build — using the wrong one for your OS isn’t supported, per the developer’s own instructions.

## Features

- **System verification and repair:** Checks the startup disk and system file structure for issues.
- **Cleaning and maintenance:** Clears caches, rebuilds indexes and databases, removes problematic leftover files.
- **Hidden settings:** Exposes and configures preferences in the Finder, Dock, Safari, and other Apple apps that aren’t in System Settings.

## FAQ

**Is OnyX free?**

Yes, free and donation-supported, per the developer.

**Do I need a specific OnyX version for my Mac?**

Yes — Titanium Software ships a separate OnyX build matched to each macOS version; using one built for a different OS isn’t supported.

**Who makes OnyX?**

Titanium Software, a French developer that has maintained OnyX since 2003.


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Hand-verified listing on Kitsmith: https://notchlist.vercel.app/apps/onyx/