Wont start on macOS: 'Could not load the Qt platform plugin "cocoa" in "" even though it was found.'

[martin-braun]

I installed the player via brew install audacious, but once I try to run it, I get:

qt.qpa.plugin: Could not load the Qt platform plugin "cocoa" in "" even though it was found.

How can I fix this problem. I have Qt installed through brew already.

[radioactiveman]

Which Qt version did you install? Do you have multiple Qt versions installed?
You may need to set QT_QPA_PLATFORM_PLUGIN_PATH, see https://stackoverflow.com/a/55322249 for more details.

If it doesn't help, please report this directly to Homebrew. https://github.com/orgs/Homebrew/discussions

[martin-braun]

Shouldn't the right Qt version be installed automatically through Homebrew? At least that's what I experience in conventional software installed through Homebrew.

Anyway I just brew install qt and now I have 6.6.1 installed. I then added QT_QPA_PLATFORM_PLUGIN_PATH="$(\ls -d /usr/local/Cellar/qt/* | tail -n 1)/share/qt/plugins" to my .zshrc which nicely resolves to /usr/local/Cellar/qt/6.6.1/share/qt/plugins.

It still doesn't work, because there is no cocoa directory in the plugins directory. I also have opencv-python-headless and opencv installed, it doesn't satisfy audacious.

EDIT: find /usr/local/Cellar/qt -iname cocoa => nothing, ls $HOME/Library/Qt => no such file or directory, I need to install https://doc.qt.io/qt-6/qtgui-attribution-cocoa-platform-plugin.html, but I find no useful information due to similar issues in regards of opencv and their python bindings that clutter results in Google.

I reported it here: Homebrew/homebrew-core#158675