Fix Slow Image Import in Acrobat PDF on macOS Catalina
Question details
The user is experiencing unusually slow performance when trying to import images into an existing PDF document.

- Product
- Adobe Acrobat 2019
- Device & OS
- macOS Catalina
- Scenario
- Importing or adding new images into an existing PDF file.
- Observed behavior
- The image import process is extremely slow and lagging compared to performance on older macOS versions, even after reinstalling the application.
Before troubleshooting, ensure you have an active internet connection and administrative privileges on your Mac to install necessary system and application updates.
Install the Latest Acrobat and macOS Updates
Updating both your operating system and the Acrobat software resolves known compatibility bugs that cause slow performance on macOS Catalina.
Major macOS updates, like the transition to Catalina, introduce architectural changes that can impact older software versions. Updating ensures you have the latest compatibility patches from both Adobe and Apple.
Open Adobe Acrobat 2019, navigate to the 'Help' menu at the top of the screen, and click on 'Check for Updates'. Follow the on-screen prompts to install any available patches.
Click the Apple menu in the top-left corner of your screen, select 'System Preferences', and then click 'Software Update'.
If a newer version or security update for macOS Catalina is available, click 'Update Now' to download and install it.
Once all updates are installed, restart your Mac to clear system caches and apply the changes before testing the PDF image import again.

Contact Adobe Support for Advanced Troubleshooting
Escalate the issue directly to Adobe Support by providing them with specific system details and visual proof of the performance lag.
Quickly Insert Images into PDFs with WPS Office
If Adobe Acrobat continues to lag on macOS Catalina, try WPS Office. It includes a fast, lightweight, and built-in PDF editor that allows you to easily insert images into your PDFs without frustrating delays.
- 1. Open Your PDF: Launch WPS Office for Mac and drag your existing PDF document into the workspace to open it.
- 2. Select the Edit Tool: Navigate to the 'Edit' tab located on the top ribbon menu.
- 3. Add an Image: Click on the 'Add Image' button and select the picture file from your Mac's storage.
- 4. Place and Resize: Click anywhere on the PDF page to drop the image, then drag the corners to instantly resize or reposition it without any system lag.

Frequently Asked Questions
Why is Adobe Acrobat running slow on macOS Catalina?
macOS Catalina introduced major architectural shifts, such as ending support for 32-bit applications and updating the way graphics are rendered. Older or unpatched versions of Adobe Acrobat may struggle with these changes, resulting in slow performance or freezing during tasks like importing images.
Can image file size affect import speed in a PDF?
Yes. Inserting very large, high-resolution images (such as uncompressed TIFFs or large JPEGs) requires more processing power. Compressing or resizing the image prior to importing it can drastically improve the import speed and keep your final PDF file size manageable.
Is there a free alternative to insert images into PDFs on a Mac?
Yes. You can use free, lightweight software like WPS Office, which natively supports seamless PDF editing on Mac. Alternatively, you can use the built-in macOS Preview app to paste images into documents, though dedicated PDF editors offer far more layout control.




