The newly discovered Jacksbot Java malware can take control of Windows, Mac, and Linux systems, although it primarily targets Microsoft's platform.

In 2010, a similar Java-applet-based social engineering attack capable of executing malicious code on Windows, Mac OS X and Linux computers, was used to distribute the Boonana Trojan program.

Java-based malware driving DDoS botnet infects Windows, Mac, Linux devices Multi-platform threat exploits old Java flaw, gains persistence. Dan Goodin – Jan 28, 2014 5:00 pm | 66 ...

It detects if you're running Windows, Mac OS X, or Linux, and then downloads the corresponding malware for your platform. Written by Emil Protalinski, Contributor July 10, 2012 at 10:09 p.m. PT ...

Oracle is now giving Mac users the ability to get Java updates at the same time as they are available for Windows and Linux with the release of the Java SE 7 Update 4.