If your workflow relies on third-party PDF-manipulation apps, High Sierra is an improvement over Sierra, but it may still not have caught up with El Capitan. Luckily, Apple has worked around most of the bugs in Preview.

If Preview is displaying some PDFs as black rectangles instead of pages, even though their thumbnails are correct, you can solve the problem in a non-obvious way: by recalibrating your display.

Notable software releases this week include Quicken 4.6.8, EagleFiler 1.8.2, and LaunchBar 6.9.4.

Following the release of macOS 10.12.4, Adam talks with PDF-savvy developers to see how well Apple is doing at fixing bugs in its rewritten PDFKit framework. The consensus is that Apple has indeed addressed some bugs but has simultaneously introduced new ones. Tread carefully.

The initial problems ScanSnap had in Sierra were just the beginning. It turns out that Apple rewrote the underlying PDFKit in Sierra and introduced numerous bugs that are bedeviling Mac developers and users alike. The quick takeaway? Don’t edit PDFs in Sierra’s Preview for now!

Apple has updated all of its operating systems, with the macOS Sierra 10.12.3 update addressing the serious bug introduced in 10.12.2 that caused Preview to delete OCR text layers in PDF files.

The most significant release of the day may have been iOS 10.3, but Apple showed some love to its other three operating systems as well, adding a new feature or two and providing some bug fixes and other under-the-hood improvements.

Apple has released OS X Mountain Lion 10.8.3 Update to address a wide variety of specific bugs and security vulnerabilities. Also included is Safari 6.0.3, with performance improvements and bug fixes, plus plugs for various security holes.

A trio of security updates block a variety of problems in Mac OS X, Safari 3, and the iPhone, underscoring the shared code between Mac OS X and the iPhone, and between the Mac and Windows versions of Safari.