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Nothing I suggested made any difference, but after some more research, Chris reported back with the solution, which he found in a thread in the Apple Support Communities. When he sent me the PDF, it opened and displayed fine in Preview on my Mac, running the same versions of macOS and Preview. TidBITS reader Chris Lee wrote to ask if I’d heard of issues with a PDF’s thumbnails rendering correctly, but each actual page showing as a single large black rectangle in the latest version of Preview under macOS 10.13.2 High Sierra. Most of the time, the problems are limited to a single corrupt PDF that might be viewable or printable with Acrobat Reader instead of Preview, but sometimes the concerns go deeper.

Thanks to our coverage of the problems PDFKit has faced in Sierra and High Sierra (see the article series “ PDFKit Problems”), I occasionally hear from readers who are having troubles of one sort or another with PDFs. #1642: How to identify phishing attacks, new iPhone and iPad passcode requirements.

#1643: New Mac mini and MacBook Pro models, new second-gen HomePod, security-focused OS updates, industry layoffs.#1644: Explaining Mastodon and the Fediverse, HomePod Software 16.3 and tvOS 16.3, GoTo breach.#1645: AirPlay iPhone to Mac for remote video, Siri learns to restart iPhones, Apple's Q1 2023 financials.