Thanks for adding this - I considered to include it, but couldn't find a source stating that the technology was officially called DisplayPDF. I think Apple's o

Thanks for adding this - I considered to include it, but couldn't find a source stating that the technology was officially called DisplayPDF. I think Apple's official term for the OS X graphics layer is "Quartz" and there's a short discussion about the use of PDF in Quartz on Wikipedia which states "Quartz's internal imaging model correlates well with the PDF object graph, making it easy to output PDF to multiple devices": https://en.wikipedia.org/wiki/Quartz_(graphics_layer)#Use_of_PDF https://en.wikipedia.org/wiki/Quartz_(graphics_layer)#Use_of... This arstechnica article linked on the Wikipedia page gives some more details, but it was written in 2000, so many things might have changed since then: https://arstechnica.com/gadgets/2000/05/mac-os-x-dp4/4/ https://arstechnica.com/gadgets/2000/05/mac-os-x-dp4/4/ I think it's reasonable to assume that Apple's Quartz code in OS X no longer includes any actual Adobe code, so this might have been sufficient to avoid the licensing fees.