MacOS isn't immune from malware. Being prepared means understanding the nature of the worst threats a security team is likely to see attacking Macs in the enterprise.
A carefully crafted attack can convince a database to reveal all its secrets. Understanding the basics of what the attack looks like and how to protect against it can go a long way toward limiting the threat.
Cross-site scripting has been around longer than most security professionals have been on the job. Why is it still such an issue when we've known about it for so long?