PDF Editing Issues

Fix Slow Image Import in Acrobat PDF on macOS Catalina

Anum MushtaqAnum Mushtaq Nov 2, 2026 869 views

Question details

The user is experiencing unusually slow performance when trying to import images into an existing PDF document.

How to Fix Slow Image Import in Acrobat PDFs on macOS Catalina
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 you start

Before troubleshooting, ensure you have an active internet connection and administrative privileges on your Mac to install necessary system and application updates.

Solution 1Recommended

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.

1
Check for Acrobat Updates

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.

2
Check for macOS Updates

Click the Apple menu in the top-left corner of your screen, select 'System Preferences', and then click 'Software Update'.

3
Install System Updates

If a newer version or security update for macOS Catalina is available, click 'Update Now' to download and install it.

4
Restart Your Mac

Once all updates are installed, restart your Mac to clear system caches and apply the changes before testing the PDF image import again.

Install the Latest Acrobat and macOS Updates
Performance Optimization: If the issue persists after updating, try compressing the images you want to import into smaller file sizes, which can significantly reduce software processing time.
Free Microsoft Office alternative

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. 1. Open Your PDF: Launch WPS Office for Mac and drag your existing PDF document into the workspace to open it.
  2. 2. Select the Edit Tool: Navigate to the 'Edit' tab located on the top ribbon menu.
  3. 3. Add an Image: Click on the 'Add Image' button and select the picture file from your Mac's storage.
  4. 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.
Lightning-fast image insertion and PDF editing tools optimized for macOS.Fully compatible with standard Adobe PDF and Microsoft Office formats like Word, Excel, and PowerPoint.Lightweight application that saves disk space and minimizes system resource usage.Intuitive, user-friendly interface that requires no learning curve.
microsoft office alternative - wps office

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.