pyinstaller native translucent not working

[h0uter]

First Check

• I added a very descriptive title here.
• This is not a Q&A. I am sure something is wrong with NiceGUI or its documentation.
• I used the GitHub search to find a similar issue and came up empty.

Example Code

# macOS packaging support
from multiprocessing import freeze_support

freeze_support()  # noqa

from nicegui import app, ui

app.native.window_args["transparent"] = True
app.native.window_args["frameless"] = True


def main():
    with ui.card():
        ui.label("Hello, NiceGUI!")

    ui.run(
        reload=False,
        native=True,
    )


if __name__ in ("__main__", "__mp_main__"):
    main()

Description

window_args not respected with nicegui-pack

build the app using nicegui-pack

nicegui-pack --name mytest --windowed main.py

start the MacOS app by running

./dist/mytest.app/Contents/MacOS/mytest

The window shown is not transparent and not frameless.

I expected it to be frameless and transparent.

Running without pyinstaller works

If I run the app locally by running the python file.

The window shown is frameless and transparent.

NiceGUI Version

2.19.0

Python Version

3.13.3

Browser

Other

Operating System

macOS

Additional Context

using ui.run(frameless=True) works as expected

If I use the option ui.run(frameless=True) in my code

# macOS packaging support
from multiprocessing import freeze_support

freeze_support()  # noqa

from nicegui import app, ui

app.native.window_args["transparent"] = True

def main():
    with ui.card():
        ui.label("Hello, NiceGUI!")

    ui.run(
        reload=False,
        native=True,
        frameless=True
    )


if __name__ in ("__main__", "__mp_main__"):
    main()

and then build the app using nicegui-pack

nicegui-pack --name mytest --windowed main.py

start the MacOS app by running

./dist/mytest.app/Contents/MacOS/mytest

The window shown is frameless but not tranparent.

[falkoschindler]

Thanks for reporting this issue, @h0uter! I can reproduce the problem, but have no idea what could be the reason.
Does anyone have an idea? Does it happen on macOS only?