Mach-O

This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (February 2021) (Learn how and when to remove this message)

Mach-O

Filename extension	none, .o, .dylib, .kext[1]
Uniform Type Identifier (UTI)	com.apple.mach-o-binary
Developed by	Carnegie Mellon University, Apple Inc.
Type of format	Binary, executable, object, shared libraries, core dump
Container for	ARM, SPARC, PA-RISC, PowerPC and x86 executable code, memory image dumps

Mach-O, short for Mach object file format, is a file format for executables, object code, shared libraries, dynamically loaded code, and core dumps. It was developed to replace the a.out format.

Mach-O is used by some systems based on the Mach kernel. NeXTSTEP, macOS, and iOS are examples of systems that use this format for native executables, libraries and object code.