MAC malware - Flashback botnet

Hi,

Did Sophos already deployed an update to prevent from downloading the payload or running the program in MAC OS? we have few MAC users and we need to ensure that these users are protected from this kind of attack. Did Sophos do some protection on this?

http://www.scmagazine.com/apple-releases-another-update-to-quell-flashback-spread/article/235566/?DCMP=EMC-SCUS_Newswire

Thank you,

tedz