saveGeometry/restoreGeometry do not work for fixed size windows on macOS

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
class MainWindow : public QMainWindow
{
 Q_OBJECT
public:
 MainWindow(QWidget *parent = nullptr);
 ~MainWindow();
protected:
 void closeEvent (QCloseEvent *e);
};
#endif // MAINWINDOW_H

#include "mainwindow.h"
#include <QSettings>
#include <QDebug>

MainWindow::MainWindow(QWidget *parent)
 : QMainWindow(parent)
{
 setFixedSize(QSize(200, 100));
 QSettings s("myOrganization", "myApplication");
 restoreGeometry(s.value("geometry").toByteArray());
 show();
}
MainWindow::~MainWindow()
{
}

void MainWindow::closeEvent(QCloseEvent *e)
{
 qDebug() << isMaximized();
 QSettings s("myOrganization", "myApplication");
 s.setValue("geometry", saveGeometry());
 QMainWindow::closeEvent(e);
}