MacOS and OSX compatibility for Endpoint Protection The Symantec Endpoint Security (SES) client for Mac is cloud-based and managed by the Integrated Cyber Defense Manager (ICDM) web page. The SES Mac client is only supported on macOS 10.15.x and 11.x with the SES Mac agent build 14.3 RU1 and newer. Additional Notes There is no 14.3 RU4 Mac client.