Are you experiencing BlackLight crashing on your Mac when you are viewing PDFs in the Preview Tab? The patch to Adobe Acrobat Reader DC on macOS (version 2019.012.20040) causes BlackLight to fail to render PDF files in the Preview tab and can crash the software.
Here is our workaround to prevent crashing and enable viewing your case’s PDF files:
1- Completely quit BlackLight
2- Open Finder and navigate to
Please note, the Library folder is hidden on macOS. You can reveal hidden files and folders in the Finder app with shortcut keys (SHIFT + CMD + . )
3- Copy AdobePDFViewer.plugin and AdobePDFViewerNPAPI.plugin to a backup location
4- Delete AdobePDFViewer.plugin and AdobePDFViewerNPAPI.plugin from
5- Empty Trash
6- Launch BlackLight and reopen the case file
You can now proceed with viewing PDF files in your case. If you encounter other issues, this article explains how to troubleshoot BlackLight with the debug console.