macOS bundle of PySide6 app doesn't launch properly

[Cirrocumulus]

Hello,

I'm using pyinstaller 4.5.1 to bundle a very simple, single window Qt (PySide6) application running under Python 3.9.6. The process finishes with no errors. However, when I double-click the app icon it launches:

- Without an icon in the dock

- Without a menu bar

- Cannot be brought to the foreground (but is visible in Mission Control)

- Can only be quite with a click on the red close button

- Doesn't accept keystrokes (which are sent to whatever other application window was last active instead)

The result is the same if I run the executable from within the .app bundle. However, if I run the executable from the folder in the dist folder (the one outside the bundle), it works as expected.

My .spec file:

app = BUNDLE(coll,

        name='myapp.app',

        icon=None,

        bundle_identifier='com.myname.myapp',

        info_plist={

            'NSPrincipalClass': 'NSApplication',

            'NSHighResolutionCapable': 'True'

        }

)

Any ideas?

Thanks.