Run `src/qt/bitcoin-qt --disablewallet=1`. 
Quitting after any amount of time will result in `Segmentation fault: 11`

0.14.0 branch at 861cb0c83db0571c2863f6b6276314e115c266ee , osx 10.12.3, Qt5.8
{
#ifndef Q_OS_MAC 
    if(clientModel && clientModel->getOptionsModel())
    {
        if(!clientModel->getOptionsModel()->getMinimizeOnClose())
        {
            
            rpcConsole->close();
            QApplication::quit();
        }
        else
        {
            QMainWindow::showMinimized();
            event->ignore();
        }
    }
#else
    QMainWindow::closeEvent(event);
#endif
}
void BitcoinGUI::showEvent(QShowEvent *event)