Hi Ritika_2000,
I definitely recommend upgrading any SEP for Mac clients to RU4. The SEP for Mac client has received many enhancements in this latest release.
New fixes and features in Symantec Endpoint Protection 12.1.4
http://www.symantec.com/docs/TECH211972
If your Mac machines are older, upgrde them to the latest SEP 11 release. They can be managed from the SEP 12.1 SEPM.
About Changes in Supported Macintosh Hardware in Symantec Endpoint Protection 12.1
http://www.symantec.com/docs/TECH167774
All the best!
Mick