- don't check for a map's freelook setting if there is no map.

Apparently on macOS, game events even get sent in the menu. This never happened on Windows…

src/g_game.cpp

@@ -757,7 +757,7 @@ void G_AddViewPitch (int look, bool mouse)
 		return;
 	}
 	look = LookAdjust(look);
-	if (currentSession && !currentSession->Levelinfo[0]->IsFreelookAllowed())
+	if (currentSession && currentSession->Levelinfo.Size() > 0 && !currentSession->Levelinfo[0]->IsFreelookAllowed())
 	{
 		LocalViewPitch = 0;
 	}