Fix Adobe Acrobat Code Signature Invalid Error After macOS Update
Question details
Adobe Acrobat fails to launch and immediately crashes due to an invalid code signature after a macOS system update.
- Product
- Adobe Acrobat
- Device & OS
- macOS
- Scenario
- Launching Adobe Acrobat right after installing a recent macOS update.
- Observed behavior
- The application crashes immediately with an EXC_CRASH error, specifying 'Code Signature Invalid' as the termination reason.
Verify your current macOS version in the Apple menu under 'About This Mac' to ensure you download the correct compatible software version.
Perform a Clean Reinstallation of Adobe Acrobat
Completely removing the damaged app using Adobe's cleaner tool and reinstalling a compatible version resolves most code signature mismatches.
Code signature errors generally occur when macOS security protocols detect corrupted or incompatible application files following a system update. A standard uninstallation often leaves residual damaged files behind, so using a dedicated cleaner tool is required.
Click the Apple logo in the top-left corner and select 'Restart'. Once rebooted, try launching Acrobat again to see if the issue was temporary.
If the crash continues, navigate to Adobe's official website and download the 'Adobe Acrobat Cleaner Tool' specifically designed for Mac.
Open the downloaded tool and follow the on-screen prompts to completely remove Adobe Acrobat DC and its corrupted system cache files.
Restart your Mac once more to ensure all Adobe background services and leftover cached signatures are completely cleared from memory.
Log into your Adobe account online, download the latest version of Acrobat DC compatible with your current macOS, and proceed with the fresh installation.
Use WPS Office as a Reliable Mac PDF Editor Alternative
If Adobe Acrobat keeps crashing due to macOS compatibility issues, WPS Office offers a powerful, lightweight alternative for viewing and editing PDFs, ensuring seamless document management without the hefty system requirements.
- 1. Download WPS Office for Mac: Visit the official WPS Office website and download the Mac installer package.
- 2. Install the Application: Open the downloaded package and drag the WPS Office icon into your Applications folder as prompted.
- 3. Open Your PDF: Launch WPS Office and simply drag and drop your PDF file directly into the workspace to start reading or editing immediately.
Frequently Asked Questions
What does 'Code Signature Invalid' mean on a Mac?
macOS uses code signing to verify that an application comes from a verified developer and hasn't been maliciously modified. The 'Invalid' error occurs when the operating system detects a mismatch or corruption in the app's signature files, commonly triggered by system files shifting during an OS update.
Will I lose my saved PDF files if I uninstall Acrobat with the Cleaner Tool?
No, your PDF files are saved independently on your local drive or cloud storage. The Adobe Acrobat Cleaner Tool only removes the application program files and system preferences, leaving your personal documents completely untouched.
Can I bypass the code signature error without reinstalling the application?
While there are advanced terminal commands that developers use to bypass signature checks, regular users should avoid this as it severely compromises Mac system security. Cleanly reinstalling the application is the safest and most reliable fix.
