Trellix Endpoint Security (ENS) for Mac doesn't support the co-existence of competitor's software in the Mac.
During the standalone installation, the installer prompts you to select modules for installation. You can select one or multiple modules. To install a module later, you must start the installation wizard. If the modules are grayed out, it indicates that the installer has detected the competitor software on your Mac. During Trellix ePO - On-prem deployment, the installation will gracefully exit and an event will be sent to Trellix ePO - On-prem with the reason for failure. You must uninstall it before installing the module. For more information, see Trellix Knowledge Base article KB78192.
Note
You can install Adaptive Threat Protection only after installing the Threat Prevention module.