Hi,

I have noticed that QQC2.ProgressBar has a broken layout on macOS 26 that seems to be introduced in Qt 6.9.3 with fix for https://bugreports.qt.io/browse/QTBUG-138947.

My QML code is something like:

Item {
    ColumnLayout {
       anchors.fill: parent
       QQC2.ProgressBar {
            Layout.fillWidth: true
       }
    }
}

In Qt 6.9.2 and older this made the progress bar to be across the whole item, but in Qt 6.9.3 the progress bar is shrinked as you can see on the attached screenshot.