PDF is the OS X and iOS native vector format (and before that, PostScript). It was one of the great design decisions made by the early NeXT OS engineers, even

PDF is the OS X and iOS native vector format (and before that, PostScript). It was one of the great design decisions made by the early NeXT OS engineers, even though few people understand what "Display PostScript" or "Display PDF" really means. Most of the toolbar icons you see in Mail, Preview, Finder, etc. are actually PDFs that scale to any size. The OP could have (and probably should have) used PDF for his vector-based graphics. And actually, by exporting raw CoreGraphics drawing functions from Illustrator he's essentially exporting a PDF document in a custom file format.