Can't install JPEG2DICOM plugins on Horos v4.0.1

[Samurai Japan]

Hello,

I recently upgraded my Mac to macOS Tahoe 26 and reinstalled Horos (v4.0.0 RC5, then v4.0.1).
Horos itself seems to work fine, but I cannot install the JPEGtoDICOM plugin.

Is there any known solution or workaround for installing plugins on this new version?

Details:

Environment

• iMac 2021 (M1)

• macOS Tahoe 26.0

• Horos v4.0.1

Steps I tried

1. Modified System Settings

   • Enabled Horos under:

     • Privacy & Security > Local Network

     • Privacy & Security > Accessibility

     • Privacy & Security > Full Disk Access

2. Installed the plugin

   • Quit Horos

   • In Finder, navigated to ~/Library/Application Support/Horos/Plugins

   • Copied the JPEGtoDICOM plugin file into the folder

   • Relaunched Horos

Result

• No pop-up window about plugin installation appears.

• The plugin is listed in the Plugin Manager, but it cannot be selected from Plugins > Database.

For comparison:
On macOS Sequoia with Horos v4.0.0 RC5, after copying the plugin file and reopening Horos, a pop-up window appeared and the plugin installed correctly.

Thanks in advance for any advice!

[Samurai Japan]

I have some additional information:

After copying the JPEGtoDICOM plugin file into the folder, I tried double-clicking the plugin file.
When I do this, a pop-up window appears (see attached).

• If I click Cancel, nothing happens.

• If I click OK and then restart Horos, the JPEGtoDICOM plugin disappears from the Plugin Manager.

2025年9月24日水曜日 12:13:09 UTC+9 Samurai Japan:

[Todd Jensen]

Have you tried this suggestion: https://groups.google.com/g/horos-project/c/5mMpNg2lNn4/m/XwmuYGjfAQAJ

Todd Jensen, PhD

Jensen Informatics LLC

[Samurai Japan]

Of course, yes.

I success to install with this solution many times on macOS Sequoia and Horos 4.0.0.RC5.

However,  I tried to install on macOS and Horos v4.0.1, error message and "Open Anyway" button doesn't appear.

  

>> 3. Re-open Horos. You'll get a "InvertData.horosplugin" cannot be opened [...]" error message. Click Cancel.

>> 4. Navigate to Apple menu  > System Preferences, click Security & Privacy, then click General. You should see an "Open Anyway" button for the blocked plugin. Click it.

Did you success to install plugins on macOS Tahoe and Horos v4.0.1 ?

2025年9月25日木曜日 6:59:59 UTC+9 jense...@gmail.com: