I have recently been engaged in deep security research on macOS for FortiGuard Labs focused on the discovery and analysis of IPC vulnerabilities. In this blog, I uncover the XPC internals data types to help researchers (myself included) not only quickly analyze the root causes of XPC vulnerabilities, but to also assist with deep analysis of exploits targeted at those vulnerabilities.

https://www.fortinet.com/blog/threat-research/a-look-into-xpc-internals–reverse-engineering-the-xpc-objects.html