Fix Acrobat XI Crashing After Scanning on Mac OS X
Question details
Users experience unexpected application crashes when attempting to scan documents directly into their PDF editor.

- Product
- Adobe Acrobat XI Pro
- Device & OS
- Mac OS X 10.9.2
- Scenario
- Scanning a physical document into a PDF editor using a connected scanner like the Canon MX472.
- Observed behavior
- The PDF application crashes shortly after the scan completes, and the scanner may occasionally fail to appear when the TWAIN driver is selected.
Ensure your Mac operating system and your scanner's specific software drivers are fully updated to the latest versions before troubleshooting the PDF application.
Update the PDF Editor and Reconfigure Scanner Preferences
Updating the software and toggling between TWAIN and Image Capture drivers usually resolves scanner-induced crashes.
Software conflicts often arise from outdated application versions or competing scanner protocols on macOS. Removing older versions and resetting your driver preference can restore stability.
Uninstall any older versions of the PDF editor (such as version 9 or X) from your Mac to prevent background software conflicts.
Ensure your Acrobat XI is updated to at least version 11.0.06 or the highest available 11.0.x patch.
Open the application, navigate to 'Preferences', select 'Convert to PDF' from the Categories list, choose 'Use TWAIN First', and click 'OK'. Close and relaunch the program.
Return to 'Preferences', select 'Convert to PDF', choose 'Image Capture' instead, and click 'OK'. Relaunch the application and test your scanning process.

Disable Assistive Technology and Check Cable Connections
Accessibility settings or wireless connection drops can sometimes trigger crashes during the scanning process.
Scan Documents Safely and Reliably with WPS Office
If your current PDF software continues to crash, use WPS Office to handle your document scanning smoothly. WPS Office provides a lightweight, highly compatible PDF editor that seamlessly captures scans without freezing your Mac.
- 1. Launch WPS Office: Open the WPS Office application on your Mac and go to the 'PDF' workspace.
- 2. Select PDF from Scanner: Click on 'Create PDF' and select the 'From Scanner' option to initiate the scanning utility.
- 3. Choose Your Device: Select your connected scanner from the dropdown list and adjust your resolution and color settings.
- 4. Scan and Save: Click the 'Scan' button. Once the physical pages are captured, review them in the editor and save your new PDF document.

Frequently Asked Questions
Why does my PDF editor crash only when I try to scan?
Crashes during scanning are typically caused by miscommunications between the PDF application and the scanner's communication protocol (like TWAIN or Image Capture), outdated software patches, or conflicting accessibility settings on macOS.
What is the difference between TWAIN and Image Capture on Mac?
TWAIN is a universal software protocol used by many third-party applications to communicate with scanners, whereas Image Capture is Apple's native scanning framework for macOS. Switching between the two in your application preferences can often bypass compatibility bugs.
Why is my scanner not showing up in the TWAIN device list?
If your scanner is missing from the list, the specific TWAIN driver for your device might not be installed correctly, or the network connection may be unstable. Try updating the manufacturer's scanner software and connecting the device with a direct USB cable.




