diff --git a/common/dialog_shim.cpp b/common/dialog_shim.cpp
index 2980c6c3df..45d149250d 100644
--- a/common/dialog_shim.cpp
+++ b/common/dialog_shim.cpp
@@ -288,6 +288,14 @@ bool DIALOG_SHIM::Show( bool show )
                          std::max( wxDialog::GetSize().y, savedDialogRect.GetSize().y ),
                          0 );
             }
+#ifdef __WXMAC__
+            if( m_parent != nullptr )
+            {
+                if( wxDisplay::GetFromPoint( m_parent->GetPosition() )
+                    != wxDisplay::GetFromPoint( savedDialogRect.GetPosition() ) )
+                    Centre();
+            }
+#endif
         }
         else if( m_initialSize != wxDefaultSize )
             SetSize( m_initialSize );