Note: There are a few ways you could define a PDF viewer/editor, as features can range from simple form-filling to complete PDF manipulation. While Lion didn't wow the crowd with most of its features, it brought some amazing additions to Apple's PDF viewer/editor that puts it over the top and makes it our choice for the best.
There are plenty of ways to view and edit PDFs on a Mac, but Apple's built-in Preview application is phenomenal and often overlooked.
