PDF Editing Issues

Fix Adobe Acrobat Freezing with Black Screen When Adding Signatures

Jason MillerJason Miller Nov 3, 2026 869 views

Question details

The user is unable to add a signature because the PDF application freezes and displays a black translucent screen.

How to Fix Adobe Acrobat Freezing with a Black Screen When Adding a Signature
Product
Adobe Acrobat Pro DC
Device & OS
macOS Mojave
Scenario
Adding a digital or standard signature to a PDF document.
Observed behavior
The application displays a black translucent screen and becomes completely unresponsive immediately after selecting the Sign option.
Before you start

Before modifying application preferences, try signing a different or newly created PDF file to ensure the issue is not caused by a corrupted document.

Solution 1Recommended

Disable the Modern User Interface for Signing

Reverting to the legacy signature interface prevents the black screen freeze in Acrobat by bypassing a compatibility glitch with macOS.

This freezing issue is often caused by a compatibility glitch between the modern signing interface of Adobe Acrobat and certain macOS environments, such as Mojave. Disabling the modern UI forces Acrobat to use the standard, stable dialog box for signature creation.

1
Open Acrobat Preferences

Launch Adobe Acrobat DC, open the application menu at the top of the screen, and navigate to Preferences > Signatures.

2
Access Creation & Appearance

On the right side of the preferences pane, locate the 'Creation & Appearance' section and click the 'More' button.

3
Disable Modern UI

In the new window, uncheck the option labeled 'Use modern user interface for signing and Digital ID configuration'.

4
Save and Restart

Click OK in the Creation and Appearance window, then click OK in the main Preferences window. Relaunch Adobe Acrobat and attempt to add your signature.

Disable the Modern User Interface for Signing
Testing Your Fix: After restarting the application, test the signature feature on multiple PDF files to confirm that the unresponsive behavior has been completely resolved.
Seamless PDF Signing Alternative

Sign PDF Documents Easily with WPS Office

Avoid freezing interfaces and system unresponsiveness. Quickly add digital or handwritten signatures to your PDF documents using the built-in, lightweight PDF tools in WPS Office.

  1. 1. Open Your PDF: Launch WPS Office and open the PDF document you need to sign.
  2. 2. Navigate to the Fill & Sign Tool: Click on the 'Fill & Sign' tab or the 'Insert' tab located in the top ribbon, then click on 'Sign'.
  3. 3. Create Your Signature: Choose to draw your signature, type it out, or upload an image of your existing handwritten signature.
  4. 4. Apply and Save: Click on the document to place your signature in the desired location, adjust the size if necessary, and save your file.
Easily insert text, image, or drawn signatures without freezingFully compatible with all standard Adobe PDF formatsLightweight application that runs smoothly on Mac and Windows
microsoft office alternative - wps office

Frequently Asked Questions

Why does Adobe Acrobat freeze when I try to sign a document?

Freezing during the signing process is often caused by a software glitch in the modern signature interface, outdated application files, or conflicts with the operating system, particularly on versions like macOS Mojave.

Can a corrupted PDF cause Acrobat to show a black screen?

Yes, file-specific corruption or complex layered elements can trigger application errors. Always test the signature feature on a blank or different PDF to determine if the issue is isolated to a single file.

How do I update Adobe Acrobat to see if it fixes the issue?

Go to the Help menu at the top of the Adobe Acrobat application and select 'Check for Updates'. Installing the latest version ensures you have all recent bug patches and performance improvements.