Can one GPU mine on Mac OS X using cgminer? I succesfully installed cgminer on my mac but every time I try to run it I get the message 

[2013-09-16 15:03:49] clDevicesNum returned error, no GPUs usable


why is this? Is it that you cannot mine with the GPU on a mac, or am I just doing something wrong? 

Specs:


Macbook Pro (2011)
Mac OS X Lion 10.7.5
Intel HD Graphics 3000 384 MB
That generation of Intel integrated graphics does not have OpenCL support, which is needed for mining.