Fix Acrobat Stuck on Checking for Security Settings When Combining PDFs
Question details
The user is attempting to combine multiple PDF files into one document, but the application freezes indefinitely on a 'Checking for security settings' dialogue, even when the files have no security applied.
- Product
- Adobe Acrobat X Pro
- Device & OS
- Mac
- Scenario
- Combining multiple separate PDF files into a single merged PDF document.
- Observed behavior
- The merging process halts and gets permanently stuck on a security check prompt, preventing the user from completing the file combination.
Verify that none of the individual PDF files are corrupted, password-protected, or digitally signed, as these elements can disrupt the merging process.
Combine PDFs Using the Mac Preview App
Using the built-in Mac Preview application is a reliable alternative to completely bypass the Acrobat security checking bug.
If Acrobat continues to stall, macOS provides a native, seamless way to merge PDF files using the Preview app without triggering unnecessary security scans.
Double-click your primary PDF file to open it in the Preview app on your Mac.
Navigate to the top 'View' menu and select 'Thumbnails', or use the sidebar slider to make the thumbnail pane visible on the left side.
Locate the other PDF files in Finder, then drag and drop them directly into the thumbnail sidebar below the first document's pages.
Click and drag the page thumbnails up or down to arrange them into your preferred custom order.
Go to 'File' in the top menu bar, select 'Export as PDF', and save the newly merged document to your desired folder.
Insert Pages Manually within Acrobat
Instead of utilizing the automated Combine Files wizard, manually inserting pages can avoid triggering the security settings loop.
Combine PDFs Instantly with WPS Office
Skip the frustrating software freezes and security check loops. WPS Office provides a fast, lightweight, and user-friendly PDF toolkit designed to seamlessly merge, edit, and organize PDFs natively on your device.
- 1. Open WPS PDF Tools: Launch WPS Office and click on the 'PDF' tab from the main dashboard.
- 2. Select Merge PDF: Navigate to the 'PDF Toolkit' section and click on the 'Merge PDF' utility.
- 3. Add Your Files: Click 'Add Files' to import all the PDF documents you want to combine.
- 4. Merge and Save: Drag the files to set your desired order, then click 'Merge' to instantly create and save your combined document.
Frequently Asked Questions
Why does Acrobat X Pro get stuck checking for security settings?
This is a known glitch in older versions of Adobe Acrobat (such as Acrobat X Pro) when dealing with specific file metadata, underlying digital signatures, or minor file corruption. The software enters an endless loop trying to verify permissions that either don't exist or cannot be processed.
Can I remove security from a PDF before attempting to merge it?
Yes. If you have the required password, open the PDF in Acrobat, navigate to File > Properties > Security, and change the Security Method to 'No Security'. Save the file before attempting to combine it with others.
Is there a faster way to merge image files into a PDF on a Mac?
Absolutely. macOS offers a native shortcut: select the image files (like JPGs) in Finder, right-click them, hover over 'Quick Actions', and click 'Create PDF'. This instantly merges them into a single PDF without opening any external applications.
