Helping you in performing advanced administration tasks on Mac

TinkerTool System for Mac

TinkerTool System 5.21

  -  14.67 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 TinkerTool System 5.21.


For those interested in downloading the most recent release of TinkerTool System 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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  • TinkerTool System 5.21 Screenshots

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    TinkerTool System 5.21 Screenshot 1
  • TinkerTool System 5.21 Screenshot 2
  • TinkerTool System 5.21 Screenshot 3
  • TinkerTool System 5.21 Screenshot 4
  • TinkerTool System 5.21 Screenshot 5

What's new in this version:

- Added new feature to change the hardware security setting that permits the unconfirmed activation of option ROMs of third-party devices. This feature is only available on Macintosh systems released by Apple before May 2015.
- Added a makeshift workaround for several defects of macOS where the system shows authorization dialogs in the wrong language or with misleading messages.
- Added a makeshift workaround for a defect of macOS where the system no longer opens authorization dialogs for the application, resulting in a “permission denied” error for all privileged functions. The application now tries to detect this system failure, guiding the user through the necessary steps to resolve this.
- Enhances performance of the application after working with Time Machine features in system configurations with slow network-based backup destinations.
- Several small changes in the user interface.