I run a Mac G5 dual 2.0 with an ATI radeon 9800 Pro XP with 256 VRAM and 3 gigs of RAM. I know this is extream but it does let cosmosaver shine. The only thing I wish the author would do is update the skins of the planets. Since the original release, Mars, Jupiter, and Saturn have had major updates for them and their moons. It would be great if CosmoSaver reflected these greatly enhanced images.