Fix Acrobat Pro 2020 Sign-In Window Not Displaying on macOS Big Sur
Question details
The user is unable to sign in to Adobe Document Cloud because the sign-in window fails to appear after a system upgrade.

- Product
- Adobe Acrobat Pro 2020
- Device & OS
- macOS Big Sur 11.0.1
- Scenario
- Attempting to launch and sign in to Acrobat Pro 2020 immediately following an upgrade to macOS Big Sur.
- Observed behavior
- The sign-in screen is completely blank or does not display at all. Standard troubleshooting methods, such as reinstalling or restarting the application normally, do not resolve the problem.
Verify that your Mac has a stable internet connection and ensure you have administrative privileges, as you may need to create a new user profile or perform a clean uninstallation.
Test Acrobat in a New macOS User Profile
Determines if the missing sign-in window is caused by corrupted preferences specific to your current macOS user profile.
Sometimes, user-specific caches or preference files become corrupted during a major macOS update, preventing applications from rendering web-based sign-in windows properly.
Click the Apple menu, go to System Preferences, and select Users & Groups.
Click the lock icon to make changes, then click the '+' button to add a new Administrator account. Set a name and password.
Log out of your current Mac account, log in to the newly created test account, and launch Adobe Acrobat 2020 to see if the sign-in window appears.
Perform a Clean Uninstallation and Reinstall
Completely clears out old application files and background services that might be causing compatibility loops on macOS Big Sur.
Try WPS Office for Seamless PDF Editing on Mac
If Acrobat continues to experience sign-in issues or compatibility glitches on macOS Big Sur, consider switching to WPS Office. It provides a robust, lightweight PDF editor that is fully compatible with macOS, allowing you to view, edit, and convert PDFs without complex sign-in blockers.
- 1. Download the Mac Version: Visit the official WPS Office website and download the installation package designed for macOS.
- 2. Install the Application: Open the downloaded file and drag the WPS Office icon into your Applications folder.
- 3. Open and Edit PDFs: Launch WPS Office, drag your PDF files into the workspace, and start editing immediately without worrying about sign-in errors.

Frequently Asked Questions
Why is the Adobe Acrobat sign-in screen blank on macOS Big Sur?
This is typically caused by a compatibility issue between older Acrobat 2020 files and the updated macOS Big Sur architecture. Corrupted user profile preferences or outdated Adobe Document Cloud background services can also prevent the web-based login window from rendering.
Will my PDF files be deleted if I use the Acrobat Cleaner Tool?
No, the Acrobat Cleaner Tool only removes application files, preferences, and background services associated with Adobe Acrobat. Your locally saved PDF documents and folders will remain completely safe on your Mac.
Is Adobe Acrobat 2020 fully compatible with macOS Big Sur?
Initial releases of macOS Big Sur had known compatibility advisories with older Adobe products. While subsequent patches addressed many of these issues, it is highly recommended to check Adobe's official Big Sur compatibility documentation and install the latest available updates.
What should I do if creating a new user profile doesn't fix the sign-in issue?
If the issue persists across different macOS user profiles, the problem lies within the core application files rather than local profile settings. You should proceed with a clean uninstallation using the Acrobat Cleaner Tool, restart your Mac, and perform a fresh installation.




