Darwin — 2 Technical Articles

Jan 24, 2026 · Fundamentals

Why Does macOS Use the ‘Darwin’ Name? Uncover Its Open‑Source Roots

macOS, iOS and tvOS all run on the open‑source BSD‑based Darwin system, whose history traces back to NeXTSTEP and explains why many macOS‑related tools carry the Darwin label despite most macOS components remaining proprietary.

DarwinNeXTSTEPPureDarwin

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Why Does macOS Use the ‘Darwin’ Name? Uncover Its Open‑Source Roots

21CTO

Jul 11, 2024 · Fundamentals

How BSD Shaped Apple’s Operating Systems: From BSD Roots to XNU

This article explores how BSD’s various releases and innovations have been integrated into Apple’s operating systems—macOS, iOS, watchOS, and others—through the Darwin core and XNU kernel, highlighting the historical evolution, technical components, and ongoing open‑source contributions.

AppleBSDDarwin

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How BSD Shaped Apple’s Operating Systems: From BSD Roots to XNU