Spool Pilot makes it possible to spool printouts from arbitrary applications in several popular graphic formats (JPEG, JPEG-2000, TIFF, PNG) as easily as it is now to save them in a PDF file. You should only choose any of "Print to ..." commands in the PDF Workflow menu, for instance, "Print to JPEG" and the document will be saved as separate JPEG files. Spool Pilot is modular, and support for many other formats may be added.
. Follow the link and free download Spool Pilot for Mac