Q: PDF font rendering issue

I am having the exact same problem. See Font in Preview blurry. No one's suggested a solution yet.

I am seeing this too.  Not sure how the PDFs are generated (bills from bank, phone company etc), but I am finding that some of the text is blurry.  It shows fine on my mac mini still running mavericks.

I have the same problem, try viewing a LaTeX rendered file in Skim, it just looks terrible. Since I work on a daily basis with LaTeX documents I had to revert via a backup to Mavericks. Hopefully this will be fixed at some point.

I just left a post (see here) under Stuart's post which summarized discussions from other sites and pointed to the incorrect anti-aliasing algorithm used by Yosemite Preview.app. For the moment the workaround is to open PDFs using Safari which apparently renders PDFs correctly.

There seems to be an annotation rendering issue as well as I've outlined in this post:

Yosemite Preview is not the same as Mavericks Preview!

I noticed this problem within 15 minutes of installing Yosemite. I'm rather perplexed at how no one at Apple noticed this. The black text appears to be rendered in a shade of gray. If this is a deliberate change, then it is most certainly a step backward.

Does anyone also realize that preview on yosemite is way slower. If you are going to view large PDF files. And the highlight also doesn't look as nice as it was in Maverick.

I have the same issue, however I did find that in full screen mode, selecting "continuous scrolling" under the view options dramatically improves the appearance. Or simply press ⌘1 when in Preview.

Yes I use preview to do most of my PDF annotation and now it is not working.

I cannot create a textbook anywhere I like as I used to be with even snow leopard.

And what is worse I cannot annotate phrases. It auto annotates the whole line no matter what.

Am I alone on this ? Or is there a tweak I am missing out there ??

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.

Feedback

So, after sending Apple feedback and waiting a few months with seemingly no progress on this front, I found a pdf reader called "Skim." Just google it. It's free and renders font a bit better than does Preview in Yosemite.

I have the same issue on my Macbook Pro Late 2012 (non-retina display).

It's very annoying that Apple did not warn about this issue when selling this "great(?)" Yosmite. A blurry quality is just at odd with all high quality graphics by Apple. Working with this blurry font is making me to hate so much Apple right now.

Did anyone eventually found a workaround?

I found that the problem is almost solved for PDF documents by using Adobe Reader instead of Preview for my PDF documents. I set Adobe Reader as the default viewer for my documents and now they look much better.

I have the same issue and I find it quite annoying. After some searching, however, I found this stackexchange answer, which suggests to replace the PDFkit framework in Yosemite by the version shipped with Mavericks. It did work for me.