Organize your ideas and projects for Mac in a simple and efficient manner!

OmniOutliner for Mac

OmniOutliner 5.8

  -  40.08 MB  -  Trial

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 OmniOutliner 5.8.


For those interested in downloading the most recent release of OmniOutliner 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!

  • OmniOutliner 5.8 Screenshots

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

    OmniOutliner 5.8 Screenshot 1
  • OmniOutliner 5.8 Screenshot 2
  • OmniOutliner 5.8 Screenshot 3

What's new in this version:

- OmniOutliner 5.8 for Mac introduces support for macOS 11 Big Sur. This release is a macOS Universal app, which can run natively on both Apple Silicon Mac and Intel-based Mac computers.
- macOS Big Sur: OmniOutliner has been updated for compatibility with macOS Big Sur
- macOS Universal App: OmniOutliner now runs natively on both Apple Silicon Macs and Intel-based Mac computers
- Omni Automation [PRO]: Omni Automation has been updated with improved security and per-script approval for external scripts
- App Icon: The app icon has been updated to feel at home on macOS Big Sur
- Licensing: The 'Unlock OmniOutliner' button in the Free Reader mode bar opens the Omni Accounts window instead of the legacy License Panel