Open the image you want to convert using the Preview application. If you cannot find Preview, use Finder (magnifying glass in the top-right corner), type Preview, and select it from the Top Hit.
Locate (A) and select the image (B) you want to convert, then select Open (C). Note: You may select multiple images to convert into a single PDF.
From the top menu, select File, then choose Export as PDF.
Choose where you want to save the PDF on your Mac, then select Save in the bottom-right corner.