Apple today has made good on its promise to release its own tool that detects and removes any instances of the Flashback malware on Mac systems running Java. The tool is only available for systems running OS X 10.6 or later, and is bundled with a slightly updated version of the most recent Java runtime, but is a separate component that is installed and runs on its own.
Following the wave of scam "MacDefender" software and its variants, Apple recently released a security update for Mac OS X 10.6 that updates the built-in "XProtect" feature to identify these threats; however, after installing the update, a number of people are finding the system is stuck with high CPU usage, resulting in the system being bogged down and running slowly. Upon checking Activity Monitor, a process called "MRT" is using a large percentage of CPU, and even with forcing the process to quit it will reappear and continue to use the CPU.
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