Hi,
Thank you for posting in Symantec community. With every SEP release Symantec is continious enhancement & here you can check all the versions release notes: https://support.symantec.com/en_US/article.TECH163829.html
In SEP 12.1 RU6 “What’s new” page is added to be a companion of the “welcome” page. What’s new” page contains the summary description of the new features and links to open pages for more information. What’s new” is displayed after every upgrade to every admin who logs onto SEPM.
Scrrenshot is attached to the reference:
I wouls suggest to go through this article as well to find out detail information on SEP 12.1 RU6 New features: https://www-secure.symantec.com/connect/articles/symantec-releases-symantec-endpoint-protection-12161686000-121-ru6
SEP 12.1 RU6 includes the additonal following support:
- Red Hat Enterprise Linux (RHEL) 7.0 and 7.1
- Oracle Linux (OEL) 6U5
Browser Support:
- Microsoft Internet Explorer 11
- Mozila Firefox 11 through 38.0.11
- Google Chrome through 42.0.2311.152
For more details go through release notes: http://www.symantec.com/docs/DOC8626
For more detail information go through public article: What’s new in Symantec Endpoint Protection 12.1.6
http://www.symantec.com/docs/HOWTO111067