Image Noise Reduction Software?
I just got a Mac myself and have been reading the Mac Talk forum looking for similar answers. On my PC, I used Topaz DeNoise, and I thought it was an absolutely outstanding program for noise reduction. I was delighted to learn that it can be used on the Mac also. You have to download a free companion utility for it to work on the Mac, and it is called Topaz Fusion Express. See: http://www.topazlabs.com/fusion/
I have not set this up yet on my Mac, but I feel assured knowing that this is an option. Topaz DeNoise is excellent at noise reduction.