http://www.macports.org/ install that
then using
sudo ports search
you look for each one of these
Dependencies:
curl dev library http://curl.haxx.se/libcurl/
(libcurl4-openssl-dev)
curses dev library
(libncurses5-dev or libpdcurses on WIN32)
pkg-config http://www.freedesktop.org/wiki/Software/pkg-config
libtool http://www.gnu.org/software/libtool/
jansson http://www.digip.org/jansson/
(jansson is included in-tree and not necessary)
yasm 1.0.1+ http://yasm.tortall.net/
(yasm is optional, gives assembly routines for CPU mining)
AMD APP SDK http://developer.amd.com/sdks/AMDAPPSDK
(This sdk is mandatory for GPU mining)
AMD ADL SDK http://developer.amd.com/sdks/ADLSDK
(This sdk is mandatory for ATI GPU monitoring & clocking)
libudev headers
(This is only required for FPGA auto-detection and is linux only)
libusb headers
(This is only required for ZTEX support)
if ports has it then you do
sudo ports install
then you download
http://ck.kolivas.org/apps/cgminer/
the tar.bz2 version
unpack it then go to the folder in terminal
./configure
after that do
sudo make
and it should create a file that you can then just run in the terminal