Hello Adobe Acrobat Reader Team,

I am unable to add a PKCS#11 module in Adobe Acrobat Reader on my Mac because the “Attach Module” button is greyed out and cannot be clicked.

Environment

Application: Adobe Acrobat Reader
Version: 2026.002.21901 — Continuous Release, Unified App
Operating system: macOS 27.0.1
Processor: Apple M5
Interface language: Turkish
Related software: AKİA, which successfully detects my electronic signature device
Steps to reproduce

Open Adobe Acrobat Reader.
Go to Preferences > Signatures.
Open “Identities & Trusted Certificates” using the “More” button.
Select “PKCS#11 Modules and Tokens.”
Attempt to click “Attach Module.”
Expected result

The “Attach Module” button should be enabled so that I can select the PKCS#11 library provided by my electronic signature middleware.

Actual result

The PKCS#11 buttons remain greyed out. I cannot open the file selection dialog or attempt to load a module. The issue therefore occurs before any PKCS#11 library is selected.

Troubleshooting already performed

Disabled “Enable Enhanced Security,” but the buttons remained disabled.
Launched Acrobat Reader using Rosetta.
Confirmed in macOS Activity Monitor that the Acrobat process is listed as “Intel,” verifying that it is running under Rosetta. The buttons still remained disabled.
Checked the security preferences; the “Enable Protected Mode at startup” option is not visible in my installation.
The electronic signature device is detected by AKİA on the same Mac. However, I cannot configure its PKCS#11 module in Acrobat Reader because the module attachment controls are disabled.

Please investigate this issue and advise whether there is a supported workaround for this version and configuration. If this is already a known issue, please provide the relevant bug reference. If diagnostic logs are needed, please provide macOS-specific instructions for collecting them.

Thank you.