Foreword
The following article was written and published in 2008. The first iPhones were less than six months old and Apple's OS X operating system was just seven years old. The previous year Apple launched a version of OS X that could run on Intel systems. The following year OS X could *only* run on Intel systems. This could have made life easier for attackers, as they faced a familiar underlying system.
A lot has changed since then. According to some statistics the use of OS X (now MacOS) has risen between 2009 and 2021 from below 4% to around 16%. This is clearly a significant rise, but with around 75% of computer users still staring at Windows, the value to an attacker of MacOS exploits is still relatively low.
Attackers have targets and the chances of a valuable one using a Mac is now five times as likely. We've seen news reports of exploits targeted Apple-based devices. NSO's Pegasus spyware is now widely recognised as being a threat that targeted civilians, including journalists.