Install the extensions using the Software Catalog.
Task
Log on to the Trellix ePO - On-prem server as an administrator.
Select Menu, Software, then click Software Manager.
From the Software Catalog → Product Categories → Software (By Label), select Endpoint Security → Trellix Endpoint Security <version_number>, select from the right pane, then check in the extensions.
Note
Additionally, you can install the Endpoint security for Mac License extension from Software Catalog → Product Categories → Software (By Label), select Endpoint Security → Trellix Endpoint Security for Mac <version_number>.