Security software blocking network

After upgrading to Big Sur, an upgrade for the security software (Symantec Endpoint Protection) was necessary. After the upgrade, all network traffic within Parallels was blocked. It seems Parallels and SEP do not play well together, possibly due to Big Sur's architecture, and this may extend to other security/antivirus software. Can Parallels investigate the root cause and issue a technical service bulletin for this? Big Sur (macOS 11.3) and SEP (14.3).

 

Hello, could you collect the tech report once the issue reproduced and post the report's ID here please?

 

The conflict between Parallels and Symantec Endpoint Protection (SEP) on macOS Big Sur may stem from the new system architecture. Both Parallels and SEP, or similar Network Security Software, require kernel-level access, which Big Sur restricts.

To resolve this issue:

1. Ensure you're using the latest versions of both Parallels and SEP.
2. Add Parallels as an exception in SEP or any other Network Security Software you use.
3. Check macOS System Preferences > Security & Privacy to allow required extensions.
4. If the issue persists, consult Parallels' support team and request a service bulletin addressing compatibility with SEP.

Updating to the latest macOS and software versions often resolves compatibility problems.