In this appendix we examine the Mach operating system. Mach is designed to incorporate the many recent innovations in operating-system research to produce a fully functional, technically advanced system. Unlike UNIX, which was developed without rega
This paper discusses the security implications of Mach being integrated with the Mac OS X kernel. A few examples are used to illustrate how Mach support can be used to bypass some of the BSD security features, such as securelevel. Furthermore, examp
