How OS X Executes Applications
I must get off my backside and have a look at programming in OS X, this article should help bridge some gaps in my knowledge from Linux/Solaris aiding learning the way Darwin(OS X) does it.
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….Highly detailed article on the way OSX executes apps. “In OS X, all files containing executable code, e.g., applications, frameworks, libraries, kernel extensions etc., are implemented as Mach-O files. Mach-O is a file format and an ABI (Application Binary Interface) that describes how an executable is to be loaded and run by the kernel.”