FYI...

- http://software.silicon.com/security/0,39024655,39170296,00.htm
6 March 2008 - "A major UK gambling business has warned that all commercial websites are at risk from a new type of unstoppable and undetectable botnet denial of service attack. Gala Coral ecommerce's gambling sites were taken down for almost 30 minutes by the next generation 10Gb distributed denial of service (DDoS) attack, delegates at the e-crime congress in London were told this week. Attackers disguised the build up of traffic from up to 30,000 PC and Apple Mac botnet computers during the attack by analysing and reproducing the browsing habits of the sites' typical users. Peter Bassill, information security officer with Gala Coral ecommerce, said attackers spent about four months infiltrating the sites ahead of the attack last year, using stolen credit card details to open the thousands of accounts needed to generate the huge volume of web traffic to swamp Coral's servers..."

("Mac botnet computers..." ???)

Yeah there are mac exploits, but it could of been an amplification or spoofed attack, which isnt directly effecting the OS.