Cocoa Interprocess Communication with XPC

New in Mountain Lion, NSXPCConnection and related API provide an Objective-C interface to the XPC system for interprocess communication. Discover how your objects and protocols work together with the API to provide an infrastructure that's easy to use in a Cocoa application or Foundation-based utility. Learn how you can factor your program into separate processes to make it more robust and more secure.

WWDC 2012 - Session 241 - macOS