openoffice.org is available for the Mac, and will produce a .pdf file from a spreadsheet, a text and/or image document, a graphics file, or a powerpoint type presentation. It's free and very capable. No need to pay adobe. Download the latest version, which is a native OS-X application.
You can burn a .pdf to a CD on a Mac, but I don't use Mac, so can't advise you on the exact steps for doing so.