How to turn off rounded corners in preview when viewing a PDF

This is simply horribly unprofessional choice. But don't ever ever try using Preview in fullscreen (I do all the time) — then it's not just poor design choice but also completely broken and buggy UI. Look at the sidebar.

[Edited by Moderator]

I'm glad I stumbled across this. Overall, I'm not a fan of how rounded the corners have become, but I certainly don't want to see this in Preview. Interestingly enough, the Pages application does not show the rounded corners, so I'm not sure why they chose to show them in Preview. I did fill out the feedback form, so hopefully it will be corrected.

I am with neuroanatomist. I am an interior designer and artist and vehemently dislike the rounded corners. An assault to anyone with a modicum of design sense. I filled out the Feedback - macOS - Apple and I am sure it will take a while to land and change. This is something that should be alterable in the user interface.

I didn't yet move to Tahoe from Sequoia. I find this issue of rounded corners a bit annoying. Anyway, could anyone tell me if the picture linked below would appear fine on Preview in Tahoe or not? I mean, would I see the round dots at the end of the segment or would they be cut off, somewhat? I agree that most of the times people do not write on corners but I use some software (asymptote is called) for drawing scientific pictures to be inserted in papers or math books I write, and this is important. Yes, I could use Skim and I even have Acrobat Pro on my Mac but, still, Preview is convenient to use, if it works as expected.

Would anyone be so kind to tell me what to expect in Tahoe with a picture like the one linked here below?

Thanks

Maurizio

link to pdf

That's great. Could you tell me which version of macOS you're using? Is it something like 26.1 Beta?

My macOS version is 26.0.1, but PDF corners always appear rounded.

Since JPEG or PNG image files display sharp corners, the inconsistent rendering across file types is an additional issue...

This is getting interesting. I created the pdf file and on Sequoia preview I do not see any rounded corners, as expected.

In the recent post by "tyskey" (Tahoe?)

How to turn off rounded corners in previe… - Apple Community

I DO see them, while in the post by Dialabrain (Tahoe, too...) I do NOT see them:

How to turn off rounded corners in previe… - Apple Community

What's going on?

Thanks

Maurizio

After 40+ years in printing and publishing, almost to when the Mac first came out (Mac SE for me), myself and my colleagues and clients must have a PDF to trust showing exactly what we will get when something is printed. It is nothing to do 'traditional rectangles' nor 'adapting to change'. We all use up to date operating systems on modern Macs. Your 30 years in the computer industry has absolutely no bearing on the needs of the printing and publishing industry

Sorry, that's not the whole truth. If "the data" says "white rectangle paper with sharp edges" and the preview aka Mac-Reader display round edges it just misinterprets a part of the data!

I don't care if "just for consistant looks throughout the OS" or to be fancy or to get closer to IOS or whatever - it's not "the data" of the PDF!

I just generated a PDF/X-3 document here with all of the printer marks on it. Opened in the Tahoe 26.0.1 Preview those marks are all present regardless of the radius treatment on the displayed document corners. I sure wouldn't be using Apple's Preview for prepress confirmation as that is what Adobe Acrobat and related plugins are meant to do.

Don't be over zealous to discount my years of experience. I knew what a Linotype key was when I was 3. I invested nearly a year helping a very large printing/publisher (Chicago) set up their custom software to work with Display Postscript on UNIX Desktops and associated connectivity to LinoType printers. They created the J.C. Penney catalogs (among many others) using that software environment.

Thank you for posting the images. They clearly illustrate the issue.

Customers receiving something like the middle image would naturally misunderstand it, and I imagine it's a nightmare scenario for many designers.

I never should have upgraded to Tahoe and especially frustrating are the "Rounded Corners in Preview" when displaying a PDF.

It seems I'm not in control of my Mac anymore!

Here a redline has been crossed!

I will abandon Apple HW, SW and OS and will go Linux, not sure about the HW yet ;-)

It doesn't matter if Apple will fix this, I will migrate away anyway, and go with FOSS

Those rounded corners are a problem everywhere in Tahoe. Apple should absolutely disable them

Go_West wrote:

Those rounded corners are a problem everywhere in Tahoe. Apple should absolutely disable them

Not for me. I like them.

Well, for me they ARE a problem.

It makes the whole OS looking very immature.

I like the glass look, but it all sends Windows Vista vibes.

At least we should have and option to set the radius.