According to a post by F-Secure Labs, the number of Mac-based security threads jumped in 2011 but still remain far below that of Windows PCs. A total of 58 unique variants were detected from April through December according to the Labs’ Threat Research Team.

Of the 57, nearly half (29 to be specific) were Trojan downloaders, which F-Secure defines as a type of Trojan horse program that secretly downloads a slew of malicious files from a remote server, then installs and executives them.

The company didn’t compare directly