Is macOS Written in C?
Contents

Mac computers are also powered by C, since the OS X kernel is written mostly in C. Every program and driver in a Mac, as in Windows and Linux computers, is running on a C-powered kernel.

What language is macOS written in?

macOS

Developer Apple Inc.
Written in C C++ Objective-C Swift assembly language
OS family Unix, Macintosh
Working state Current
Support status

Is OSX written in Objective-C?

Objective-C was the standard programming language supported by Apple for developing macOS (which descended from NeXTSTEP) and iOS applications using their respective application programming interfaces (APIs), Cocoa and Cocoa Touch, until the introduction of Swift in 2014.

Sarah Jenkins

Sarah Jenkins

Senior Technology Editor & AI Specialist

Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.

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