Small write up called finding sysent on OS X 10.6.1. Good information for Mac OS X rootkit writers.
You can download it from the following link: https://packetstormsecurity.com/files/download/82065/osx1061sysent.txt
Source: https://packetstormsecurity.com/files/82065/Finding-sysent-On-OS-X-10.6.1.html