Okay, here is the source of the problem:
According to Wikipedia http://en.wikipedia.org/wiki/List_of_Intel_graphics_processing_units
the HD 3000 card only supports OpenGL up to version 3.3.
So, I'm really sorry, but it seems that you will not be able to run (at least) this demo on that machine.
But because of this, and also because of Apple in general only supporting up to OpenGL 4.1 even on their very latest hardware, I am planning on porting that particular demo to OpenGL 3.1 with vertex and fragment shaders - so doing it the goold old GPGPU way.
I guess, Apple is to blame for this one.
But any further tutorials within that ray tracing tutorial will again use OpenGL 4.3, since that version for the first time introduced a way to handle large amounts of arbitrarily structured data streams with Shader Storage Buffer Objects (SSBOs).
So, the only thing left for me to tell you is, thanks for reading the tutorial and trying out the demo, and also sorry, because as it stands, this particular demo application will not run on your machine.