Unverified50% confidenceFactExact time
macOS long held POSIX certification, and its BSD-derived toolchain and XNU kernel provide POSIX-compliant interfaces, so even after losing the UNIX trademark it remains a POSIX-compatible system.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/22/2026
First Seen
Valid until: 1/20/2027
Sources
macOS Is No Longer UNIX: Apple Didn't Renew Certification, But the Technology Is Unchanged
youtubeThe Lunduke Journal10/22/2026
Related Entities
Related Claims
UnverifiedBoth basename and dirname come from the POSIX standard and can be used on Unix-like systems such as Linux, macOS, and BSD.70% similarUnverifiednl originates from Unix System V and has a formal specification in the POSIX standard.68% similarUnverifiedXNU's BSD subsystem derives directly from FreeBSD, providing POSIX system calls, the process model and the network stack.66% similarUnverifiedAfter August 30, nothing has changed technically in macOS; POSIX compatibility, the underlying architecture and the command-line tools all remain as before.62% similarUnverifiedmacOS的XNU内核基于Mach微内核与BSD层，不包含Linux namespace和cgroups实现，因此macOS容器方案必须依赖运行Linux虚拟机61% similar
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