MacOS file system icons have changed

[Rory_1]

My application used to show system icons like this running in MacOS:

Since sometime after Qt 6.0 they now look like this:

Has this change originated with a change in MacOS or Qt? If I run my application in Windows I get the expected windows file system icons.

I can replicate this behavior with a minimal example:

FileExplorer.pro

QT += core gui widgets
SOURCES += main.cpp

main.cpp

#include <QApplication>
#include <QMainWindow>
#include <QTreeView>
#include <QFileSystemModel>
#include <QVBoxLayout>

class Explorer : public QMainWindow {

public:
    Explorer(QWidget *parent = nullptr) : QMainWindow(parent) {
        QFileSystemModel *fileSystemModel = new QFileSystemModel(this);
        fileSystemModel->setRootPath(QDir::rootPath());

        QTreeView *treeView = new QTreeView(this);
        treeView->setModel(fileSystemModel);
        treeView->setRootIndex(fileSystemModel->index(QDir::homePath()));
        treeView->setSortingEnabled(true);

        QWidget *centralWidget = new QWidget(this);
        QVBoxLayout *layout = new QVBoxLayout(centralWidget);
        layout->addWidget(treeView);
        setCentralWidget(centralWidget);

        setWindowTitle("File System Explorer");
        resize(800, 600);
    }
};

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    Explorer explorer;
    explorer.show();
    return app.exec();
}

MacOS does not appear to have changed as this is what I see in the finder:

Thanks in advance for any guidance.

[SGaist]

Hi,

Which version of Qt are you rubbing ?
On which version of macOS ?

[Rory_1]

Sonoma 14.5.
Qt 6.7.2, 6.7, 6.5.3, 6.4.0, 6.2.0 all same behavior.

[SimonSchroeder]

You could try to use the native file dialog (it's an option in QFileDialog).

[artwaw]

@Rory_1 Hi, I built your code.

File icons are OK, folder icons are somewhat "generic". Looks like model gets its decoration role from a different source? I only have the Qt 6.7.2 here so I trust you when you say it's same for different versions. That would also imply something changed in OS libraries from where the Qt gets the icons?

[Rory_1]

@artwaw Thanks for verifying my results.

[Rory_1]

@SimonSchroeder Thanks for the suggestion Simon. My application subclasses QFileSystemModel in order to show the user the count of images in a folder, and displays the QTreeView in a QDockWidget, so using QFileDialog is not going to work. I could substitute the native icons in the QFileSystemModel data update, but I'm hoping for a better solution.

[SGaist]

It seems that 6.6.3 is not suffering from that issue but indeed 6.7.2 does.

A build from the dev branch however is showing things correctly again so it might already be fixed for 6.8.

[Rory_1]

@SGaist Thanks!! I'll mark this as solved.

[Rory_1]

Followup: Qt 6.8 beta 2 does indeed resolve this issue. Many thanks to the Qt team.

[Ghenady]

Noticed this on Windows. Is there a way to switch between native icons and those custom? They suit nice on dark theme with Fusion style.

[Steven_314]

Seeing this behavior on Windows with 6.8.3, was there a QTBUG tracking this behavior and/or fix that may have more information?