For example, its Gatekeeper tool can prevent you from installing anything other than Apple-approved or registered software. In fact, March 2016 saw the first example of Mac breaching ransomware.Īpple continues to keep its Mac operating system security beefed up. If you use your Mac to go online, you’re still open to many of the same issues that affect Windows PC users, including spam emails, phishing scams, Trojan malware, browser vulnerabilities and ID theft. Even if the Mac operating system has traditionally proven resistant to virus attacks, there are still risks.