Hello, A friend of mine, an avid amature photographer, recently purchased the Artisan 810 printer after seeing great prints in the store, printed from a PC. At home, unpacked and ready to go, the printer produced off color images from her macbook. The images where somewhat grainy and the colors matched poorly. I am assuming that it is some sort of calibration issue, but if someone has any experience or tips, let me know. I'm actually quite computer savvy, I just dont have much background in printers of photography of any sort. Thanks a lot!