Thanks javabear, I am a photographer, when I am not teching workstations. I need to submit high res jpegs in Mac format to various publishers. I have never had a problem with Windows, but hadn't tried Macs. As to why they request JPG's over Tiff's, not sure, although the jpg's I send are usally about 5 megs or larger and they will print pretty sharp up to 16 x 20.