macOS add images to a PDF file

Problem

How do I add images to a PDF file on a Mac?

Solution 1 – For multiple images into a single PDF

1. Select all images in Finder by holding down the Command key and selecting
2. Ctrl-click on of the files and select Open With Preview
3. In Preview, select File, Print.   In the lower left, select PDF, Save as PDF and give it a name.
4. Open the PDF in Preview and check it.    You may have to rotate pictures using Command-R or Command-L and save it again.

Solution 2 – For a single image to an existing PDF

1. Open the image you want to insert with Preview (from Finder hit spacebar then Open in Preview)
2. Select File, Export to PDF 
3. Open the PDF you want to add to in Preview
4. Select Edit, Insert, Page from File and select the file created in step 2
5. File, Save

There is paid software that has more control than the built-in Preview app.   Any photo program on the Mac can also be used to Print to PDF using solution 1.