Mac: Print to PDF

In using the Beta version for MAC I have come across a glich that I need help on. When trying to print to a PDF the image comes in as a small postage stamp size in the bottom left hand corner of the page. No problem plotting a full size sheet, just using the built-in pdf printer that comes with the MAC software. Any advice?iMAc using MAC OS X Lion 10.7.5

OBO: Bruce Duggan