Problems with QMenu and QSystemTrayIcon on macOS

Oleh Herashchenko

I have small system tray application like this:

TrayApp::TrayApp(QObject *parent) : QObject(parent)
{
    m_trayIcon = new QSystemTrayIcon(this);

    m_trayMenu = new QMenu();
    m_subMenu = new QMenu("Submenu", m_trayMenu);
    connect(m_trayMenu, &QMenu::aboutToShow, this, &TrayApp::rebuildTrayMenu);
    m_trayIcon->setContextMenu(m_trayMenu);
    m_trayIcon->show();
}

void TrayApp::rebuildTrayMenu()
{
    m_trayMenu->clear();

    m_subMenu->addAction("Action_1");
    m_subMenu->addAction("Action_2");

    m_trayMenu->addMenu(m_subMenu);
    m_trayMenu->addSeparator();
    m_trayMenu->addAction(tr("Exit"), this, &TrayApp::onExitTriggered);
}

When I open subMenu for the first time (from the moment of launch until opening subMenu, no menu elements were activated) the entire menu disappears. I tried Python - same result. Qt 6.10.2, macOS 26.3

SGaist

Hi and welcome to devnet,

Can you provide a complete minimal compilable reproducer please ?
This will allow people to test in the same conditions as you.

Oleh Herashchenko

TrayApp.hpp

#ifndef __TRAY_APP_HPP__
#define __TRAY_APP_HPP__

//need include QMessageBox
//need include QSystemTrayIcon
//need include QObject

class TrayApp : public QObject
{
    Q_OBJECT
public:
    explicit TrayApp(QObject *parent = nullptr);
    ~TrayApp();

private slots:
    void rebuildTrayMenu();
    void onExitTriggered();

private:
    QSystemTrayIcon *m_trayIcon = nullptr;
    QMenu *m_trayMenu = nullptr;
    QMenu *m_subMenu = nullptr;
};

#endif // __TRAY_APP_HPP__

TrayApp.cpp


#include "TrayApp.hpp"
#include <QApplication>

TrayApp::TrayApp(QObject *parent) : QObject(parent)
{
    m_trayIcon = new QSystemTrayIcon(this);
    m_trayIcon->setToolTip(QStringLiteral("Tray App"));
    m_trayIcon->setIcon(QIcon::fromTheme("system-software-update"));

    m_trayMenu = new QMenu();
    m_subMenu = new QMenu("Sub Menu", m_trayMenu);
    connect(m_trayMenu, &QMenu::aboutToShow, this, &TrayApp::rebuildTrayMenu);
    m_trayIcon->setContextMenu(m_trayMenu);
    m_trayIcon->show();
}

TrayApp::~TrayApp()
{
    delete m_subMenu;
    delete m_trayMenu;
    delete m_trayIcon;
}

void TrayApp::rebuildTrayMenu()
{
    m_trayMenu->clear();
    m_subMenu->clear();

    m_subMenu->addAction(tr("Item 1"));
    m_subMenu->addAction(tr("Item 2"));

    m_trayMenu->addMenu(m_subMenu);
    m_trayMenu->addSeparator();
    m_trayMenu->addAction(tr("Exit"), this, &TrayApp::onExitTriggered);
}

void TrayApp::onExitTriggered()
{
    QApplication::quit();
}

main.cpp

#include "TrayApp.hpp"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    app.setQuitOnLastWindowClosed(false);
    app.setOrganizationName(QStringLiteral("Tray App"));
    app.setApplicationName(QStringLiteral("Sloth"));

    if (!QSystemTrayIcon::isSystemTrayAvailable()) {
        QMessageBox::critical(nullptr, QStringLiteral("Systray Error"),
            QStringLiteral("System tray is not available on this computer."));
        return 1;
    }

    TrayApp trayApp;
    return app.exec();
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.16)
project(TrayApp LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 17)

find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets Quick Qml)

set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(HEADERS
    TrayApp.hpp
)

set(SOURCES
    main.cpp
    TrayApp.cpp
)

add_executable(${PROJECT_NAME} ${HEADERS} ${SOURCES})

target_link_libraries(${PROJECT_NAME} PRIVATE
    Qt6::Core
    Qt6::Gui
    Qt6::Widgets
    Qt6::Quick
    Qt6::Qml
)
target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_SOURCE_DIR})

Oleh Herashchenko

@SGaist
It looks like the issue is macOS-specific. Everything works fine on Sequoia 15.7.3. The issue is with Tahoe 26.3.

SGaist

26.3 might have broken something... Did you already check the bug report system ?