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

OnyX for Mac

OnyX 3.1.2

  -  30.69 MB  -  Freeware

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 3.1.2.


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!

  • OnyX 3.1.2 Screenshots

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

    OnyX 3.1.2 Screenshot 1
  • OnyX 3.1.2 Screenshot 2
  • OnyX 3.1.2 Screenshot 3
  • OnyX 3.1.2 Screenshot 4

What's new in this version:

- Deleting the logs improved
- Deleting the archived logs improved
- Deleting the Internet cache improved
- Utilities > Visibility pane improved
- Parameters > Dock pane improved
- New option: Show/hide the Dock
- Parameters tabs rearranged
- New version integrated 3.9.2 of sqlite3
- Removed the "Display a message in the Notification Center" option in the Preferences pane
- Integrated new version of Network Link Conditioner
- Minor corrections
- Help updated and improved