Hello,
Here are the Answers to your Questions -
Best practices Policies for MAC -
Check these Articles:
Symantec Endpoint Protection for Macintosh Frequently Asked Questions
www.symantec.com/docs/TECH134203
Recommendations for installing Symantec Endpoint Protection for Macintosh / Symantec Antivirus for Macintosh on Mac OS X Server
http://www.symantec.com/docs/TECH132046
what is SEP firewall behavior when SEP firewall and Windows firewall work parrallel ?
Check these Articles:
Best Practices for using Windows Firewall with Symantec Endpoint Protection 12.1
http://www.symantec.com/docs/TECH196975
About Windows Firewall and Symantec Endpoint Protection's NTP
http://www.symantec.com/docs/TECH97986
what SEP firewall does with pre built customized rules in windows firewall when SEP firewall installs and disable windows firewall ?
Windows Firewall is indeed turned off when SEP NTP is enabled, indicated by the Installed Firewall list, as well as the General Firewall status section indicating that firewall rules are being managed by SEP.
Check these Articles:
Windows 7 Firewall indicate that "These Settings are being managed by vendor application Symantec Endpoint Protection", even when Symantec Endpoint Protection (SEP) 11.0 Network Threat Protection (NTP) is not installed.
https://www-secure.symantec.com/connect/articles/windows-7-firewall-indicate-these-settings-are-being-managed-vendor-application-symantec-en
Advanced Settings for Windows 7 Firewall indicate that it is on, even when Symantec Endpoint Protection (SEP) Network Threat Protection (NTP) is installed.
http://www.symantec.com/docs/TECH123729
what are the best practices for windows servers ?
Check this Article:
Best Practices for Installing Symantec Endpoint Protection (SEP) on Windows Servers
http://www.symantec.com/docs/TECH92440
Hope that helps!!