Hi Karen, welcome to the club! I work on a G4 MP 500 (dual proc) with 1.2 GB RAM and your mac might have the same performance as mine. So you should be able to get your things done. As Walther already said it really depends on the images and render setting. Some of my works took ages to finish others not. I'm currently struggling with a new image (1600x900 pixels), but that's because of the render settings I use. Just give it a try... Have fun, Phil