PDFs opened in the Preview app for Mac OS Mojave (10.14.0) are blurry. It's most visible when looking at text but lines and other graphics are blurry as well and it's worse the more you zoom out. I'm on a MacBook Pro (Retina, 13-inch, Mid 2014). Being able to render PDFs clearly is just such a basic task for a PDF viewer — which makes it all the more baffling why this has remained an issue for at least since the release of Mac OS High Sierra (https://forums.macrumors.com/threads/blurry-pdf-rendering-in-preview.2074669/). One weird thing I noticed is that a PDF opened in Quick Look is actually nice and crisp but the same PDF opened in the Preview app is still blurry: Of course, Google Chrome or any other PDF Viewer still renders PDFs nicely on Mac OS Mojave: Here's a close-up of the difference between Preview and Chrome: As others have noticed, PDFs viewed on iOS devices – e.g. via the Files app – are blurry as well. Reading a PDF on my iPad Pro has really become a pain. This apparently points towards PDFKit being the problem. Does anyone have a clue as to what is going on and why Apple is not addressing this?