I've built Emacs master branch a few times now on OSX 10.6.8 from scratch beginning from cloning the master and have concluded that the fist suggestion by Alan is sufficient to permit a successful build and working version of Emacs.

-  unsignedlong does not need any changes.

-  ns_query_color does not need any changes.

Changing colorUsingDefaultColorSpace from deviceRGBColorSpace to genericRGBColorSpace is sufficient.

I am unsure why my initial attempts at changing only colorUsingDefaultColorSpace was insufficient.  I am 99.99% certain that I did a `make clean` before doing another `make` and `make install`.

Keith