OS X static batching not working

I have a scene with a large number of objects created with a large number of materials. These objects do not move and I have set each have static batching. This works on my windows machine, however I am targeting iOS and have the same project shared over my mac book.

The hardware is quite different but it seems that the static batching is just not working under this operating system. And then again the draw call count is through the roof when I run this on iOS. What is going on? The hardware is quite different but the project is identical. So why is the batching result so different?

 

I make that about 4x the number of draw calls. If there some option I have not set correctly? or does this result from the underlying hardware.