Most programs can save documents in the PDF format but can’t edit them. Here, we collected the best 10 free PDF editors for Mac to help Mac users easily work with PDFs. PDF documents are widely used for business, school, or general use. The greatest strength of PDF documents is that their contents doesn’t change no matter what kind of program you use to open them or what device you’re viewing them on. If the style or formatting of documents was changed in the process of transmission or opening, important information could be misunderstood.