PDF Opening Issues

Fix Adobe Acrobat 9 Compatibility Issues on macOS

Ayan MasoodAyan Masood Oct 28, 2026 869 views

Question details

User needs a way to fix compatibility and file association issues with Adobe Acrobat 9 on macOS after a CS3 reinstall.

How to Fix Adobe Acrobat 9 Compatibility Issues on macOS
Product
Adobe Acrobat 9
Device & OS
macOS 10.12.6
Scenario
Reinstalling Creative Suite 3 on a newer macOS version results in software failure.
Observed behavior
Adobe Acrobat 9 stops working, and exported PDF documents default to opening in macOS Preview instead of the intended PDF editor.
Before you start

Check your exact macOS version in the Apple menu under 'About This Mac' to understand your system's limitations with 32-bit legacy applications.

Solution 1Recommended

Change the Default PDF Viewer on macOS

If PDFs are automatically opening in Apple Preview instead of your preferred PDF editor, you must manually update the system's file association settings.

Because Acrobat 9 may fail to register itself as the default handler on newer macOS versions, the system automatically falls back to Apple Preview. Reassigning the default application will fix this behavior for all future PDF files.

1
Access file information

Locate any PDF file on your Mac, right-click (or Control-click) it, and select 'Get Info' from the context menu.

2
Expand the Open with section

In the Get Info window, scroll down to the 'Open with:' section and click the arrow to expand it.

3
Select a new default application

Click the dropdown menu and choose a supported PDF application installed on your Mac instead of Preview.

4
Apply to all PDFs

Click the 'Change All...' button below the dropdown, then confirm your choice to apply this setting to every PDF document on your system.

Change the Default PDF Viewer on macOS
Free PDF Solution

Use WPS Office to Open and Edit PDFs on macOS

Instead of struggling to run outdated legacy software like Acrobat 9, use WPS Office. It provides a built-in, highly compatible PDF reader and editor that works natively and seamlessly on modern macOS versions.

  1. 1. Install WPS Office: Download and install WPS Office for Mac from the official website or the Mac App Store.
  2. 2. Access the PDF tools: Launch WPS Office and select the 'PDF' tab from the main workspace interface.
  3. 3. Open your document: Click 'Open', browse your Mac's storage, and select the PDF file you wish to view.
  4. 4. Edit and annotate: Use the intuitive top toolbar to highlight text, add comments, edit content, or convert the PDF to other formats effortlessly.
Native support for modern macOS versions without requiring legacy JavaComprehensive PDF reading, editing, annotation, and conversion toolsFully compatible with standard Adobe PDF formatsLightweight application that runs smoothly on Mac devices
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Frequently Asked Questions

Why doesn't Adobe Acrobat 9 work natively on macOS Sierra (10.12.6)?

Adobe Acrobat 9 and CS3 are older 32-bit applications that were never updated for modern macOS architectures. They lack the necessary framework updates and rely on deprecated dependencies like legacy Java, causing them to crash or fail to open.

Can I run Adobe CS3 on macOS Catalina or newer?

No. Apple completely dropped support for 32-bit applications starting with macOS Catalina (10.15). Adobe CS3 and Acrobat 9 are 32-bit apps and will not launch at all on these newer operating systems.

How do I stop Apple Preview from taking over my exported PDFs?

You can change the default PDF handler by right-clicking any PDF file, selecting 'Get Info', choosing your preferred PDF editor under the 'Open with' dropdown, and clicking the 'Change All' button.