macOS Sierra: Save a document as a PDF
You can share a document with other people by saving it in Portable Document Format (PDF). Even people without the app you used to create the document will be able to read it as long as they have a PDF viewer, such as Preview or Adobe Acrobat.
Open the document you want to save as a PDF.
Choose File > Print.
Click the PDF pop-up menu, then choose Save as PDF.
Choose a name and location for the PDF file. Enter the information you want in the Title, Author, Subject, and Keywords fields.
Later, you can search on the contents of those fields using Spotlight.
To protect your document with a password, click Security Options.
You can require passwords for opening the document, copying from the document, and printing the document.