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MON, 12 OCT · 83 ITEMS
"Apple/macOS removed from official Unix registry" — Hacker News (best) · AI & Technology
Apple's macOS has been removed from the official maintained by The , meaning macOS is no longer listed as a certified UNIX system. This likely reflects that recent versions of macOS (such as macOS 26) no longer meet the certification requirements of the Single UNIX Specification, or that Apple has not renewed its certification. The removal marks a notable change from Apple's long-standing practice of marketing macOS as a UNIX operating system following its initial certification of Mac OS X.
The claim is based on the official Open Group registry page, which is the authoritative source for UNIX certification status. Hacker News discussions confirm that macOS entries have been removed from the main register, though some older versions may still appear on separate pages. The claim is solid and reflects a change visible on the registry itself.
Genuinely new: the removal was observed on the Open Group registry and reported in October 2026.
We previously covered the ongoing dispute over macOS's UNIX certification in January 2025, when OSnews reported that macOS 15 only conforms to an older version of the SUS and questioned the validity of Apple's certification. That earlier story foreshadowed this removal.