The PDF format was created by Adobe to share documents across programs and computer platforms. However, there are times it may be necessary to convert a PDF file to a JPEG. For example, if you need to include pages from the PDF in a presentation, or if you want to optimize something for the Web you may choose to convert the file to a JPEG. Apple makes is easy to convert PDF files to JPEG files with the Mac's Preview software.
Open the PDF in Preview.
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Click the "File" menu and choose "Print."
Select the "PDF" drop-down menu and click "Save PDF to iPhoto." Preview will automatically save each page of the PDF as a JPEG.
Open Finder and navigate to your iPhoto album. It will most likely be located in "Macintosh HD" | "Users" | [Username] | "Pictures" | "iPhoto Library" | "Originals" | [Year] | [Date].
Rename the JPEG. Preview chooses a random name when it saves the JPEGs. You will need to rename the JPEG to something more descriptive. Click the name of the file, wait a second and click it again. The name will then be active and you can enter a new name.
You can convert one page of a PDF in Preview by clicking on "Save As..." and changing the format to JPEG.