WX_NSImage WXDLLIMPEXP_CORE wxOSXGetNSImageFromCGImage( CGImageRef image, double scale = 1.0 );
CGImageRef WXDLLIMPEXP_CORE wxOSXCreateCGImageFromNSImage( WX_NSImage nsimage, double *scale = NULL );
CGContextRef WXDLLIMPEXP_CORE wxOSXCreateBitmapContextFromNSImage( WX_NSImage nsimage);
-double WXDLLIMPEXP_CORE wxOSXGetMainScreenContentScaleFactor();
wxBitmap WXDLLIMPEXP_CORE wxOSXCreateSystemBitmap(const wxString& id, const wxString &client, const wxSize& size);
WXWindow WXDLLIMPEXP_CORE wxOSXGetMainWindow();