Snow Leopard Security
Snow Leopard has over 1000 new additions, one of which being reported is XProtect, Apple’s step in the direction towards security. When the user launches an installer the file is checked for malicious software currently only iServices Trojan horse and DNSChanger Trojan horse and the user is prompted with a warning. This is limited in scope and misses the vast majority of malware for Mac OS X. Read more the register.