Can't run the GUI application on macOS Catalina

[jeandeaual]

The macOS DMG package doesn't seem to run on macOS Catalina or newer.

To Reproduce

• Download the DMG from from https://github.com/jeandeaual/tts-deckconverter/releases
• Open it and move the .app to another folder
• Double-click to open
• Go to Settings -> Security & Privacy -> General and authorize the app to run

After that the app doesn't open. When running it from the command-line, I get the following error: LSOpenURLsWithRole() failed with error -10810 for the file tts-deckconverter-gui.app.

The common solutions found on Google for this error are:

• Run chmod +x tts-deckconverter-gui.app/Contents/MacOS/tts-deckconverter-gui
• Run xattr -dr com.apple.quarantine tts-deckconverter-gui.app
• Open the app using Right-Click → Open.
  None of these worked.

The only solutions I found are:

• Directly run the executable inside tts-deckconverter-gui.app → Contents → MacOS, but that's not very user-friendly.
• Create an Apple Developer Account and sign the package using fyne-cross darwin -release, but that's expensive.