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

OnyX for Mac

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OnyX 2.9.9

  -  25.07 MB  -  Freeware
Free Download

Security Status

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 2.9.9.


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.


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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 2.9.9

  • OnyX 2.9.9 Screenshots

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    OnyX 2.9.9 Screenshot 1
  • OnyX 2.9.9 Screenshot 2
  • OnyX 2.9.9 Screenshot 3
  • OnyX 2.9.9 Screenshot 4

What's new in this version:

- New option: Turn on/turn off the new document saving in iCloud Drive
- New option: Allow multiple simultaneous recordings in QuickTime Player
- New option: Backspace key to go to the previous page in history
- New option: Show/hide confirmation warning when changing a file extension
- New preference: Check used disk space when the application opens
- Deleting the Internet cache improved
- Deleting the fonts cache improved
- Deleting the logs improved
- Bug corrected when turning off the startup sound with some configurations
- Bug when restoring the default settings of the Finder pane corrected
- Added a level indicator to show the amount of used hard drive space (Info > Disk)
- New version integrated 3.8.11.1 of sqlite3
- Integrated new version of Network Link Conditioner
- New replacement icon
- Deleting the Catalan, Polish, Russian, Arabic, Danish, Turkish, Hungarian, and Romanian localizations (no translators anymore)
- Miscellaneous improvements and minor corrections

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