"Debuggers" implemented mostly through ReadProcessMemory / mach_vm_read / process_vm_read/pread are all intended to defeat anti-debug mechanisms, though; I'm not clear how unfork is meant to make the process simpler, but it looks intriguing.
process_vm_read and its equivalents allow you to read data whose layout you already know. unfork allows you to read data whose layout you don't know or that is partially generated by calling the accessors that the application already has for that data instead of reverse-engineering them and doing the transformation yourself.
