Hello,
With the Release of Latest version of Symantec Endpoint Protection for Mac 12.1.4, it has introduced IPS feature with Antivirus / Antispyware.
However, Symantec Virus Definitions & Security Updates website does not show Symantec Endpoint Protection for Mac 12.1.4 - IPS definitions updates.
There is no way to check the latest definitions for IPS component available from Symantec Liveupdate Server.
Hope to see this get updated very soon.
Regards,