Annoying slowness of Preview after Yosemite upgrade

Out of curiosity, has Apple every officially acknowledges the problems concerning Yosemite and PDF files? I made a call to a tech on this and we spent some time but he didn't have any knowledge of this or similar threads existing. Also sent in feedback on the issue. It would be so nice if occasionally someone from Apple poked their smart little heads in here and acknowledged issues like this.

So what I am gathering from reading this thread is that viewing detailed pdf's ( i.e. detailed floor plans for a large building ) is just going to cause problems regardless of the software being used - UNLESS I feel comfortable digging into system files? That is not going to happen.

So, we are onto the next installment of the Mac OS.. I wonder if Apple has paid attention and fixed this issue. Can anyone answer that question?

Hi,

You can have a try in updating to OSX 10.11 El Capitan. The pdf performance is much better than 10.10, especially turning on 'always show scroll bar' in System Preference (I don't know why, and it makes UI a little bit ugly, since you've to bear a scroll bar all the time). The overall FPS when scroll a whole-text PDF file is around 55-60, which is excellent, but is only 40-55 in those pdf containing pictures, formulae.

This performance is good comparing to Yosemite, but still can't hit the height in Mavericks. However, there are lots of new features worth in trying in 10.11, such as split views. Therefore, if you are the kind not sensitive in slight frames dropping, I suggest you can have an update when the version of El Capitan is least 10.11.2, since the 10.11 and 10.11.1 is sometimes buggy.

Kind Regards,

Lufei

Considering my files will lock up for seconds every single time I attempt to zoom or scroll, 40 FPS sounds like heaven! I am currently on a chat with Apple Care asking specifically if the issue was addressed. It does sound like they have worked it out from your response though. I will most likely wait for the next patch or two and them upgrade.

Got off a chat session and end result is Senior support member will forward this thread and my chat to software engineers for answers and contact me back with hopeful resolution. I sent him a file that exhibits slow downs when interacting using Preview/OSX 10.10.5. He opened the file in 10.11 and zipped around. The file is only just over 800KB so it's very small but has a lot of details. Support doesn't have any Macs with Yosemite to test anything.. 😮. Pretty ridiculous since I was told they support back to 10.6, officially.

I explained that viewing this file using the preview function built into Finder ( hitting the space key while file is highlighted ) I could zip around that file, zooming and scrolling with no slowdown at all. Once open in Preview, zooming or scrolling beach balled me every single time I interacted with the file. Also explained that my iPad mini 2 was able to zip around at lightning fast speeds. It seems clear it's an issue in 10.10.5 but they either don't want to acknowledge it, or somehow just don't know about it.. I can't believe it's the latter.

If anyone wants a copy of the transcript I have it.

I got some follow up questions regarding the issue after reporting it and successive Yosemite iteration. Unfortunately I haven´t seen any improvements in Yosemite. However in El Capitan the improvement is very noticeable, indeed for some multilayer files works even better than in ML.

Just tried this solution

http://forums.macrumors.com/threads/preview-pdf-annoying-slowness-since-yosemite .1806654/page-2

and it works perfectly. Note that there is on this page a link to the correct PDFKit.

Why can't Apple make this official ?

Amazingly, I still have the problem under Sierra.

Looks like Apple does not really care about this kind of problem.