OnyX is a powerful and free tool intended for overall cleaning and optimization on computers with an operating system Mac OS X / macOS. Like any other operating system, macOS also accumulates redundant data, cache files, and program fragments over time, which can significantly slow down system performance.
OnyX is designed to address these issues and increase the efficiency and speed of your PC while providing full control over hidden system settings.
In This Post
Expert Tips
Advanced Finder and Dock Customization
- Open OnyX and navigate to the Parameters section.
- Select the Finder tab to access hidden settings.
- Enable the option to Show/Hide hidden files immediately without using Terminal commands.
- Switch to the Dock tab.
- Adjust the setting to Change the spaces between icons to fine-tune the Dock’s appearance.
How This Would Help: These settings allow power users to quickly toggle visibility of system files and personalize the Dock’s layout, which is typically only possible by executing complex defaults write commands in the Terminal.
Changing Default Screen Capture Settings
- Go to the Parameters section in OnyX.
- Select the General tab.
- Locate the setting for Screen capture file format.
- Change the default format from PNG to a more compressed format like JPEG or a lossless format like TIFF.
- Use the Path to save screen captures option to set a specific folder, preventing desktop clutter.
How This Would Help: By changing the default file format, users can optimize storage space (JPEG) or ensure maximum quality (TIFF) for their screenshots. Redirecting the save path keeps the Desktop clean and organized, a common power-user preference.
Run Essential Maintenance and Cleaning Tasks
- Launch OnyX and navigate to the Maintenance tab.
- Select the desired cleaning options, such as clearing system cache, user application cache, internet cache, and logs.
- Optionally, check “Spotlight index” to rebuild it if you have search issues.
- Click Run Tasks or Execute to start the process.
- Allow OnyX to close other applications and restart your Mac if prompted, as this is often required for changes to take effect.
How This Would Help: Regularly performing these tasks helps remove redundant data, free up disk space, and improve overall system performance and responsiveness by ensuring caches and indexes are optimized.
Main Features
- Maintenance and Cleaning: The tool removes junk files, temporary data, application remnants, and other redundant data that accumulates in the system and takes up disk space, ensuring a cleaner Mac.
- Cache Management: It allows clearing the system cache, user application cache, and browser cache, which often results in significantly speeding up the loading and performance of applications.
- Restore Indexes: Provides the option to repair and restore various system indexes and databases, contributing to the overall integrity and smooth operation of macOS.
- Access to Hidden Settings: OnyX provides access and modifiability to multiple standard and hidden settings of the system, which are usually only accessible through the command line or editing system files.
- Personalization: This allows you to customize the way Mac OS X/macOS works, changing the behavior of the Finder, the Dock, and other core system components to increase its performance according to your personal preferences.
- Detailed System Information: The tool provides useful and detailed information about the state of the computer system, including data about hardware, installed software, system versions, and load.
- Disk Check: Includes features for checking file system structures and permissions that help maintain disk integrity and diagnose potential issues.
- Multilingual Interface: OnyX owns a multilingual interface, making it accessible and user-friendly for a wide range of users around the world.
Technical Specifications
| Software Name | OnyX |
|---|---|
| Version | 5.0.1 |
| License | Freeware |
| File Size | 8.8 MB |
| OS Support | macOS |
| Language | Multilingual |
| Developer | Titanium Software |
| Homepage | https://www.titanium-software.fr/ |
| Changelogurl | https://www.titanium-software.fr/en/onyx_releasenotes.html |
| Last Updated | February 16, 2026 |
Required Specs
Minimum
- OS: macOS Tahoe 26
- Processor: Intel-based Mac or Mac with Apple silicon
- RAM: null
- Disk Space: null
- Graphics: null
Recommended
- OS: null
- Processor: null
- RAM: null
- Disk Space: null
Installation Steps
Installation Steps
- Click the download button above to get the installer for your operating system.
- Locate the downloaded.dmg file and double-click to open it.
- Drag the OnyX application icon to your Applications folder.
- Launch OnyX from your Applications folder and grant full disk access if prompted, then enter your administrator password to proceed.
- Agree to the license agreement and allow OnyX to verify your startup disk structure (recommended for first-time use).
Compatibility: Ensure you download the version of OnyX that is specifically compatible with your macOS version.
Problem Solving
- Issue: App can’t be opened because it is from an unidentified developer → Solution: Go to System Settings > Security & Privacy > General, and click Open Anyway for OnyX.
FAQ
Is OnyX free to use?
Yes, OnyX is completely free for use and is distributed as freeware.
What operating systems does OnyX support?
OnyX is designed specifically for macOS and Mac OS X. There is a specific version of it for each major operating system version, ensuring compatibility and optimal performance.
Is OnyX safe for my Mac?
OnyX is a reliable utility developed by Titanium Software. However, it works directly with sensitive system files and settings, so it is recommended to use it carefully and make changes only if you understand their implications to avoid potential system stability issues.
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