Every drawing or set we give to someone else should be archived as a PDF in the project folder at 2 Output : PDF Archive. This is for convenience and our own protection.
Archives should be named with the date, and a description if the set is for a specific purpose, such as a permit set. Example: Somebody 2005-03-11 Permit.PDF.
In OS X, PDFs can be created from any print dialog by clicking the Save As PDF button.
PDFs saved in this way will be single files with all the printed sheets in them.
You can use PDFs to send drawings to consultants, if they just want to view the drawings and don't need CAD data. If they need actual drawing stuff, you need to send DWGs.
You can view drawing set PDFs using Adobe Reader or Preview, the OS X PDF viewer. Preview is generally better.