It turns out that data is corrupted when editing PDF in 'Preview' of macOS Big Sur



macOS has an application called '

Preview ' that allows you to open and edit PDF and image files. However, in the latest version of macOS, ' macOS Big Sur ', it has become clear that editing a PDF file using 'Preview' will corrupt the original data.

Preview in macOS Big Sur is irreversibly destroying PDFs – again – Annoying Technology
https://annoying.technology/posts/86f4ea27e4cd90d0/

The image on the left below is a PDF version of the document using the ScanSnap iX500 . The upper half of the image on the right is the data as it is converted to text using the application called ABBYY FineReader that ScanSnap iX500 uses to convert the document to PDF, and the lower half is the PDF edited with 'Preview' of macOS. The one saved after. You can see that the lower half of the image on the right is garbled and the characters can no longer be read, that is, the data is corrupted.



As of December 2016, it was reported that PDFs are not displayed correctly on macOS, and DEVON technologies, a technology community site, said , 'Specific PDF files are not displayed correctly in DTP software, but they are displayed correctly in DTTG2. Specifically, using ABBYY FineReader Pro 12 , which is a high-precision OCR , documents saved using MRC compression are not displayed correctly. ' The macOS at this point is macOS Sierra (version 10.12) released in September 2016.

Odd PDF Behavior --DEVONthink / Feedback --DEVONtechnologies Community
https://discourse.devontechnologies.com/t/odd-pdf-behavior/21400



Similarly, if you update to macOS 10.12.2 and then edit the PDF file in the preview of Mac, the OCR text layer of the PDF file OCRed by ScanSnap Manager will be destroyed, which is the leader of DocumentSnap that recommends paperless. Reported by Brooks Duncan. Duncan said, 'If you edit and save the PDF in preview, you will not be able to search the PDF and the text will not be selectable. This bug could be reproduced on another Mac with macOS 10.12.2 installed. However, it does not seem to affect files that have been converted to PDF by other scanners and applications. '

macOS Sierra 10.12.2 --OCR Text Removed with Preview And Scanned PDFs?
http://www.documentsnap.com/ocr-text-macos-sierra-preview/



However, the 'PDF file bug' that occurred in macOS Sierra is not inherited by the latest macOS Big Sur, and the bug in macOS Sierra has been fixed in macOS 10.12.3 released in January 2017. It was. So macOS Big Sur (version 11) has a different, but similar problem. 'The ScanSnap iX500 is a very popular scanner, and the OCR software ABBYY FineReader it uses is the most popular OCR software,' said software engineer Manuel Grabowski . -I blame the software for having problems similar to those that have occurred in the past.

In addition, Grabowski said, 'ABBYY, the developer of ABBYY FineReader, has made it public that it doesn't support macOS Big Sur, and there's nothing wrong with that, but Apple says,'I'm using ABBYY products. If you shouldn't upgrade to macOS Big Sur, ”I'm not saying at all. Apple might not have been so angry with the release of this bug,” Apple said. I'm complaining about not mentioning that editing a PDF in the preview of can lead to data corruption.

in Software, Posted by logu_ii