Hi there, can someone please help me answer a very simple question. Is SP compatible with SU 2015 Pro on a Macbook running OSX 10.9.5?

I've expanded the SP zip and dumped the contents into the Plugin folder associated with SU2015. SketchyPhysics is visible in the extensions tab found under File/Preferences etc but nothing relating to SP comes up in the toolbar. I have also tried the same process with my previous versions of sketchup 2014 and 8.

Am I doing something wrong or does SP just not work on Mac?

Thanks in advance

Matt