Macs have the built-in ability to create PDFs from any application--be it Word, Excel, FirstClass or anything else--by printing it to PDF*. Here's how:

  1. Open the document.
  2. Choose "Print" from the File menu.
  3. In the dialog box that appears, click "PDF" (at the bottom left) and select "Save as PDF..."
  4. Name the file and save it where you can find it.
  5. There is not step 5.

* Note: Some applications have a built-in export or "share" function that also allow creation of a PDF. In these cases, there might be additional options available when using these functions rather than the Print > Save as PDF method.