Fix Acrobat Pro DC Combine Files Tool Not Working on Mac
Question details
The user is unable to merge documents because the Combine Files tool in Adobe Acrobat Pro DC is unresponsive.

- Product
- Adobe Acrobat Pro DC
- Device & OS
- macOS
- Scenario
- Attempting to merge multiple documents into a single PDF file using the built-in Acrobat utility.
- Observed behavior
- The Combine Files tool does nothing or completely stops responding when clicked, despite the application being fully supported on 64-bit macOS.
Verify that your macOS is up to date and check your Creative Cloud desktop app to ensure your Acrobat subscription is active and synced properly.
Update Acrobat and Test the Application Menu Route
This resolves temporary UI glitches and ensures your software is running the latest bug fixes without relying on the right-hand tool pane.
Often, specific shortcut panes can freeze while the core functionality remains intact. Triggering the tool from the main system menu can bypass this UI glitch. Additionally, installing the latest patches resolves known freezing issues.
Close Adobe Acrobat Pro DC completely. If it is frozen, press Cmd + Option + Esc, select Acrobat, and click Force Quit. Reopen the application.
Navigate to Help in the top menu bar and click Check for Updates. Install any pending updates and restart the app.
Instead of using the tools pane, go to the top menu bar and click File > Create > Combine Files into a Single PDF.

Contact Official Adobe Support
Engage Adobe's official technical support if local troubleshooting fails, as they fully support current application versions.
Use WPS Office to Combine Your PDF Files Seamlessly
If Adobe Acrobat continues to freeze, you can quickly merge your documents using WPS PDF. WPS Office provides a lightweight, fast, and highly compatible suite of PDF tools that work perfectly on macOS without the heavy resource load.
- 1. Open WPS PDF: Launch WPS Office on your Mac and navigate to the PDF tab.
- 2. Select Merge PDF: Click on Merge PDF from the main toolkit dashboard or the top navigation ribbon.
- 3. Add and Combine Files: Drag and drop the files you want to combine, arrange them in your preferred order, and click the Merge button to generate your new PDF.

Frequently Asked Questions
Why does macOS show a 32-bit installer warning for Adobe Acrobat?
This warning occasionally appears due to older background installer components. However, Acrobat Pro DC for Mac itself is a 64-bit application, and this warning does not cause the Combine Files tool to stop working.
Do I need to repurchase Acrobat if tools suddenly stop responding?
No, you do not need to repurchase the software. As long as your subscription is active, you are entitled to updates and full functionality. Restarting the app or reinstalling it usually resolves these unresponsive feature issues.
Are there other ways to trigger the Combine Files tool in Acrobat?
Yes. If the right-hand shortcut pane freezes, you can navigate to the top menu bar and select File > Create > Combine Files. This alternative route often works when the tool pane itself is unresponsive.




