McAfee Inc, the No. 2 security software maker, said production of software code known as malware, which can harm computers and steal user passwords, reached a new high in the first six months of 2010. McAfee said total malware production continued to soar and 10 million new pieces of malicious code were catalogued. McAfee also warned users of Apple's Mac computers, considered relatively safe from virus attacks, that they may also be subjected to malware attacks in the future. In April, McAfee Labs detected the Mac-based Trojan known as “OSX/HellRTS,” which reads or modifies the contents of the clipboard or plays tricks on the user like opening and closing the CD drive.