Apple released an update today for its built-in, malware protection platform, XProtect, in response to the emergence of a Mac-targeting trojan that hijacks Google searches. The trojan was first discovered in early August by researchers at Finish security firm F-Secure. The user is then redirected to a fake Google search page that is hosted on servers controlled by the scammers. Experts have been prophesying the widespread emergence of Mac-based malware for years, despite reports like these, malware authors continue to target users of the Windows and Android operating systems.
Source: https://threatpost.com/apple-updates-xprotect-detect-mac-trojan-081011/75524/