Preview is an often underused Mac OS X app that can handle a lot of file and image conversion tasks without the need for downloading any third-party tools. Change PDF to JPG / JPEG on Mac with Apple's Preview How to Buy and Read Kindle Books on iPhone or iPad How to Convert KFX eBooks to TXT Method 1. Convert PDF to JPG / JPEG images with PDF Converter for Mac.Change PDF to JPG / JPEG images with Apple's Preview.Here in the following, we're talking about how to change PDF to JPG / JPEG on Mac. Its format and big size make it difficult to open and view PDF on devices. And PDF file is not friendly for devices with small screens and storage. To open PDF files, you have to install a PDF reader. As we all know, we can open images almost on every platform while it is not the case with PDF files. Have you ever thought of converting PDF files to JPG / JPEG format for conveniently viewing or better preserving in Mac OS X? Yes, it is a good idea.