link view: http://www.youtube.com/watch?v=ws0UdSIn000
https://mining.bitcoin.cz/
 Mining software (miners)
python OpenCL bitcoin miner - https://bitcointalk.org/?topic=1334.0
GPU Mining on OS X Using poclbm - https://bitcointalk.org/index.php?topic=12360
Mac users are reporting difficulties with the latest kernels. If possible, make a copy of your miner before updating to a newer version.

For those wanting to use poclbm to do GPU mining on Snow Leopard these are the steps I followed.

1) Install XCode, its free from Apple. If you haven't already you will need to sign up for a developer account, which is also free.

2) Install bitcoin from http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.3.21/bitcoin-0.3.21-macosx.zip/download (or latest).

3) Open a terminal and enter the commands:
GUI mining - updated Dec 3 with 7970 bugfix, also supports Stratum! - https://bitcointalk.org/?topic=3878.0