I am running Adobe Photoshop CS on a Mac Book Pro that has a 2.2 Ghz Intel Core 2 Duo processor and 4 GB of RAM. I use mostly the basic elements of Photoshop CS to make album art or to sort through and edit pictures. For these purposes, and with this machine, I have never had any issues running the software, as it has always run efficiently and smoothly for me.
I’ve been using Adobe Photoshop CS for about a year and half. I should also note that I have version 2 of Photoshop CS. For what I need the software for, it has always worked great for me. While it can take a bit of getting used to for those of us who don’t know too much about digital photography and its editing capabilities, I found that after a bit of practice I was able to achieve everything I wanted to. The price of CS isn’t as expensive as some of the other models and I would recommend this to those who want to get their feet wet with a program like this but don’t want to shell out a ton of cash. Overall, I love Photoshop CS and highly recommend it.