QStyledItemDelegate vs QStyleOption vs OSX

Some reason the QStyleOptionButton is not painted on OSX, works great on linux

Code:

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QStyleOptionButton button;
 
            //QListView *view = qobject_cast<QListView*>(parent());
            //view->style()->drawControl(QStyle::CE_PushButton, &button, painter);
 
            QApplication::style()->drawControl(QStyle::CE_PushButton, &button, painter);

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Any ideas ?
Thanks.

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Added after 1 15 minutes:

Using QStyle::CE_CheckBox works, but it draws the checkbox, I checked in Qt of 4.7.3 and 4.8.1.

How did you initialize the QStyleOptionButton instance?