You can use to verify the startup disk and the structure of its system files

OnyX for Mac

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OnyX 4.2.1

  -  4.34 MB  -  Freeware
Free Download

Security Status

  • Latest Version

    OnyX 4.7.1

  • Operating System

    macOS 12.0 Monterey or later

  • User Rating

    Click to vote

  • Author / Product

    Titanium Software / External Link

  • Filename

    OnyX.dmg

  • MD5 Checksum

    14521d22f24c92de25db642cd0929aae

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of OnyX 4.2.1.


For those interested in downloading the most recent release of OnyX for Mac or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


We would love to hear from you

If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

Download OnyX 4.2.1

  • OnyX 4.2.1 Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

    OnyX 4.2.1 Screenshot 1
  • OnyX 4.2.1 Screenshot 2
  • OnyX 4.2.1 Screenshot 3
  • OnyX 4.2.1 Screenshot 4

What's new in this version:

- Issue corrected that occurred when verifying the structure of the file system from an external startup disk
- Info pane improved
- Added option to turn on/turn off the older style of alerts
- Added option to change the size of spacing between the icons in the Dock
- Miscellaneous improvements made
- Help corrected and improved

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