The Java-exploiting malware OSX.Flashback.K variant has ceased to be a meaningful threat to Mac owners, and the number of infected Macs has dropped to one-sixth its high point in just over a week, reports utility vendor Symantec. The malware, which was the most successful attack thus far in the Mac world due to a slow updating of Java, was never much of an actual security threat but did manage to reach around one percent of installed base, a record for malware penetration.