I plan to get a new MacBook Pro Retina 15" Broadwell with Iris Pro graphics card (Not dedicated) in the Summer 2015, can I run Blender for Mac in this machine?
Blender will work for sure, even on a computer without a dedicated Nvidia GPU .
Cylces rendering on GPU might be limited. You will need to enable experimental features to work on OpenCl.
To enable OpenCL read turn on Cycles GPU render on non CUDA computers