FontAwesome not working in mac app using QT and QML - qt

Question

I've included on my QT project the fontawesome font:
This one https://fontawesome.com/how-to-use/on-the-desktop/setup/getting-started
The problem is that it works well with windows system but not in MAC.
Below i'm going to show a sample app with all the code to illustrate the problem:
main.cpp
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QtQml>
int main(int argc, char *argv[])
{
QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
QFile res2(":/resources/fonts/Font Awesome 5 Free-Solid-900.otf");
QFile res3(":/resources/fonts/Font Awesome 5 Free-Regular-400.otf");
QFile res4(":/resources/fonts/Font Awesome 5 Brands-Regular-400.otf");
if (engine.rootObjects().isEmpty())
return -1;
return app.exec();
}
main.qml
import QtQuick 2.7
import QtQuick.Dialogs 1.2
import QtQuick.Layouts 1.3
import QtQuick.Controls 2.3
import QtQuick.Window 2.3
ApplicationWindow {
visible: true
width: 640
height: 480
title: qsTr("Hello World")
FontLoader { id: fontAwesomeSolid; source: "fonts/Font Awesome 5 Free-Solid-900.otf" }
FontLoader { id: fontAwesomeRegular; source: "fonts/Font Awesome 5 Free-Regular-400.otf" }
FontLoader { id: fontAwesomeBrands; source: "fonts/Font Awesome 5 Brands-Regular-400.otf" }
Button {
id:buttonAbout
anchors.right: parent.right
anchors.rightMargin: 10
anchors.bottomMargin: 0
width:15
height: 15
text: "\uf129"
font.family: fontAwesomeRegular.name
contentItem: Text {
anchors.fill:buttonAbout
anchors.right:buttonAbout.right
anchors.bottomMargin: 3
text: buttonAbout.text
font: buttonAbout.font
color: "black"
horizontalAlignment: Text.AlignHCenter
verticalAlignment: Text.AlignVCenter
}
background:
Rectangle{
width:15
height: 15
anchors.top:parent.top
anchors.right: parent.right
radius:10
border.width: 1
border.color:"gray"
}
onClicked: popup.open()
}
Popup {
id: popup
x: 100
y: 100
width: 200
height: 300
modal: true
focus: true
closePolicy: Popup.CloseOnEscape | Popup.close()
}
}
I've created a new .qrc file where i added the folder fonts of fontawesome
Font Awesome 5 Free-Solid-900.otf
Font Awesome 5 Free-Regular-400.otf
Font Awesome 5 Brands-Regular-400.otf
That screens that demonstrate what happens, in windows:
and in MAC:
This was done with QT 5.12
EDIT:
i provide the code for this app
https://drive.google.com/file/d/1ZSZBzg0fS9IUNpQ540M4cGlRQATV4NlU/view?usp=sharing
This way can anyone that uses MAC test this code please?