How to get the geo position of a device. C++/Qt?

Question

Qt

Good day.
I am writing in C++/Qt in OS X operating system. There was a need to find out the location of the device. Off. docs found the QGeoPositionInfoSource class. I can't get the tool to work because it doesn't return the corresponding object.
Clipping from the docks:
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QGeoPositionInfoSource *QGeoPositionInfoSource::createDefaultSource(QObject *parent)
Creates and returns a position source with the given parent that reads from the system's default sources of location data, or the plugin with the highest available priority.
Returns 0 if the system has no default position source, no valid plugins could be found or the user does not have the permission to access the current position.
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Please help me figure out how to make it return the geo position. While I suspect that the application stupidly does not have access.