Hi long time i mac user what would you suggest for a malware and security soft ware ?
None. Allow OS X to do what it is designed to do. Most third party anti-virus software turns off the built-in protections so they can do what it already does. There are ZERO actual computer viruses for OS X. There have been exactly seven OS X proof-of-concept virus candidates in the last sixteen years and every single one of them failed to infect any target Macs for the same reason: lack of a viable transmission vector and when actually installed on the target Mac by hand, built-in system protections in the target areas prevented them from doing what they were designed to do. Every person who has tried to create a truly self-propagating, self-installing, self-duplicating computer virus for OS X computers over a span of sixteen years has failed miserably.
There are 87 known Trojan applications in seven identified families for OS X Macs. That's it. Those include all of the browser hijackers there are which add ad-ware etc. 87 total malware.
The OS X operating system will identify every single one of those 87 and their families to catch any variations that may pop-up, and alert the user that he or she is downloading, installing, or running for the first time any one of them and then require the user to input an administrator's name and password to continue with each of those steps to continue. It requires that user to be industrial strength stupid to infect a Mac with a known Trojan. When a new one, or a new family appears, Apple pushes out the new definition of either within 24 hours to every Mac in the wild. The OS X operating system cannot do that if you install any third party anti-malware app which turns it off or inserts itself between the that operation and allows the actual saving of the malware before checking for content.