pdf rendering as black rectangle

Pdf's are rendering as black rectangles in Preview.app. Notice the thumbnails in the screenshot. They also render thusly if I tap the spacebar in finder for a Quick Look. I have tested 20 or so pdf's. I have not tested all of the pdf's on this system, obviously (far too many). Opening the exact same file in, e.g., Firefox displays it properly.


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Mac mini, macOS High Sierra (10.13)

Posted on Oct 5, 2017 8:35 AM

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70 replies

Dec 13, 2017 2:32 AM in response to pjgrandinetti

pjgrandinetti wrote:


Can you share how you would test this?

Sure.


Suppose you have a mac mini (call it A) showing the problem, and another mac (call it B) which does NOT show the problem.


We want to determine if the problem is hardware-specific (i.e. it happens on A because it is a certain mac mini model) or system specific (i.e. it happens on A because of some combination of software in the system).


Here is what I would do: boot A from the system installed in B, and vice-versa, and test.


My conjecture is that the machine B, if started from the drive in the machine A, would show the issue; whereas in the reciprocal case, A, booted from the drive in B, would display the pdf just fine.




How can you boot A using the drive of machine B?

In what follows, I will assume both machines have a Thunderbolt port (alternatively, one could do the same with Firewire). [If that is not an option, the same can still be done, but requires making a clone of the system drive to an external drive and booting the other machine from that external]


1) Turn both machines off, and connect them with the appropriate cable (Thunderbolt or Firewire)


2) Start B in Target Disk Mode (by holding T at startup). This makes B behave just as an external (Thunderbolt or Firewire) drive. Start A holding down the Option key, and select the B drive as the startup drive.

At this point, you are running machine A with the software installed on B. Test. Do pdf files look ok?


3) Shutdown A, then turn B off pressing and holding the power key.

Repeat step 2, now reversing the roles of A and B.

Dec 20, 2017 2:36 AM in response to Cmetzendorf

And just like in the initial post - the PDFs look just fine when I use e.g. chrome to open them, the page-preview in the side-bar of the preview app also looks fine. So it seems to be something wrong with preview - at least that's my best guess. If it was the file, it should be broken for all PDF viewers; or preview is more sensitive to subtle errors in the file...but then again, that's not good either if other apps have no problems with such errors.

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pdf rendering as black rectangle

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