Other PDF Issues

Fix Adobe Acrobat Pro 2020 Freezing When Signing PDFs on Mac

Steven ParkerSteven Parker Nov 5, 2026 869 views

Question details

Adobe Acrobat Pro 2020 freezes or crashes on a Mac when attempting to sign or edit PDF files.

Fix Adobe Acrobat Pro 2020 Freezing When Signing PDFs on Mac
Product
Adobe Acrobat Pro 2020
Device & OS
macOS
Scenario
Signing a document, adding watermarks, or inserting text boxes in a PDF file.
Observed behavior
The application becomes unresponsive, freezes, or crashes, requiring the user to force-quit the program.
Before you start

Ensure your macOS is fully up to date and close any heavy background applications that might be consuming excessive system memory.

Solution 1Recommended

Test with a Local PDF File

Rule out network latency or permission issues by working with a locally saved file instead of a shared drive.

Network interruptions or slow shared-drive connections can cause Acrobat to freeze when trying to save complex edits like digital signatures or watermarks.

1
Download the file

If your PDF is stored on a shared network or external drive, copy the file to a local directory on your Mac, such as your Desktop or Documents folder.

2
Open locally

Launch Adobe Acrobat Pro 2020 and open the locally saved PDF file.

3
Apply the signature

Attempt to sign or edit the document again to see if the freezing issue persists.

Test with a Local PDF File
Tip: Always perform heavy editing or signing operations on local files, then upload the finished document back to the network drive.
Reliable PDF Editor

Sign and Edit PDFs Smoothly with WPS Office

Avoid system crashes and freezing by using WPS Office. Its built-in PDF editor provides a lightweight and stable environment for macOS users to seamlessly sign, watermark, and modify documents without performance drops.

  1. 1. Download WPS Office: Download and install the free version of WPS Office for your Mac.
  2. 2. Open your PDF: Launch WPS Office and open the PDF document you need to sign.
  3. 3. Navigate to Fill & Sign: Click on the 'Protect' or 'Fill & Sign' tab in the top navigation ribbon.
  4. 4. Add your signature: Create your digital signature and click on the document to apply it securely.
Smooth performance on macOS without freezing or crashingSeamless compatibility with all standard PDF filesAll-in-one suite for PDF, Word, Excel, and Presentation
microsoft office alternative - wps office

Frequently Asked Questions

Why does my Mac freeze only when adding watermarks or signatures in PDFs?

Editing actions like adding watermarks or digital signatures require additional processing power and re-rendering of the document. Corrupted app preferences, conflicting system permissions, or excessively large files can cause these specific features to freeze the application.

Does saving a PDF to a network drive affect editing performance?

Yes. Editing and signing directly on a network or shared drive can cause latency issues and lead to software freezes if the connection drops or delays while saving the signature data. Always copy the file locally before signing.

How do I force quit Acrobat on a Mac when it freezes?

If Acrobat becomes completely unresponsive, press Command + Option + Esc simultaneously on your keyboard. Select Adobe Acrobat from the list of applications in the Force Quit window and click 'Force Quit'.