PDF Security & Access Issues

Fix Cryptographic System General Failure in Acrobat on Mac

Steve KSteve K Oct 28, 2026 868 views

Question details

The user encounters a cryptographic system error when trying to secure a PDF file with a password or a digital certificate signature.

How to Fix the Cryptographic System General Failure in Adobe Acrobat
Product
Adobe Acrobat
Device & OS
macOS
Scenario
Adding password protection or applying a digital signature to a PDF document.
Observed behavior
Acrobat displays a 'Cryptographic System General Failure' error message and prevents the security settings from being successfully applied to the PDF.
Before you start

Ensure you have a stable internet connection to download any necessary software updates, and save a backup copy of your PDF document to avoid data loss during troubleshooting.

Solution 1Recommended

Update Adobe Acrobat and Restart Mac

Installing the latest patches often resolves underlying cryptographic and certificate handling bugs in Acrobat on macOS.

1
Open Adobe Acrobat

Launch the Adobe Acrobat application on your Mac where the error occurs.

2
Check for Updates

Navigate to the top menu bar, click on the 'Help' menu, and select 'Check for Updates' from the drop-down list.

3
Install and Restart

Follow the on-screen prompts to download and install any available updates. Once completed, restart your Mac and try applying the password or signature again.

Checking Version Details: If the issue persists, check your Acrobat version by clicking 'Acrobat' in the top-left menu bar and selecting 'About Adobe Acrobat'. Adobe Support may require this exact dot version.
Secure Your PDFs Seamlessly

Easily Password-Protect and Sign PDFs using WPS Office

If Acrobat continues to display cryptographic errors on your Mac, WPS Office provides a highly compatible and lightweight PDF editor. You can easily add passwords, restrict permissions, and digitally sign your PDF documents without complex system errors.

  1. 1. Open your PDF: Launch WPS Office and open the PDF document you want to secure.
  2. 2. Navigate to the Protect tab: Click on the 'Protect' tab located on the top ribbon menu to access the security tools.
  3. 3. Encrypt the document: Click on 'Encrypt' to set a document open password or restrict editing and printing permissions.
  4. 4. Sign the PDF: To digitally sign the document, click 'Sign' under the 'Protect' tab, and create or import your signature.
  5. 5. Save changes: Click 'Save' or press Cmd+S to securely apply your password or signature to the PDF.
Seamlessly secure PDFs with strong document password encryption.Easily insert digital signatures and annotations without system errors.Highly compatible with Adobe Acrobat PDF file formats and standards.Lightweight and fast performance on both macOS and Windows.
microsoft office alternative - wps office

Frequently Asked Questions

Why does Acrobat show a cryptographic system general failure on my Mac?

This error typically occurs due to outdated Acrobat software, conflicts with macOS Keychain certificates, or software bugs in how Acrobat handles digital IDs during the document encryption or signing process.

Does this cryptographic error affect both passwords and digital signatures?

Yes, the cryptographic general failure can occur during either process, as both rely on the underlying cryptographic modules in Adobe Acrobat and macOS to securely encrypt the PDF document.

How do I check my Acrobat version on a Mac?

Open Adobe Acrobat, click on 'Acrobat' in the top-left menu bar next to the Apple logo, and select 'About Adobe Acrobat'. A window will appear showing the specific dot version installed on your device.

Can I use another application to password-protect my PDF?

Yes, alternative PDF editors like WPS Office or the built-in macOS Preview application can be used to add password protection or digital signatures to your PDF files if Acrobat is failing.