macOS is No Longer UNIX

macOS and UNIX Certification

The Lunduke Journal presenter says Apple did not renew macOS’s official UNIX certification. The Open Group, which controls the UNIX trademark and certifies products through its Open Brand program, had listed August 29, 2026, as the next renewal date for macOS 26.0 on Apple silicon. The presenter says macOS disappeared from the organization’s certified-products list shortly afterward.

What the Change Means

The loss of certification is formal, not a sudden technical change. It did not itself alter macOS, remove its POSIX compatibility, or change its Unix-like behavior. Historically, Apple worked with The Open Group to meet certification requirements, which the presenter says were adjusted over time to accommodate macOS.

Certification is also distinct from technical heritage. Linux is Unix-like but is not certified as UNIX. FreeBSD, NetBSD, OpenBSD, and other BSD systems are likewise uncertified, despite their historical lineage from BSD and UNIX. The presenter says these examples raise broader questions about what “UNIX” means.

Apple’s Reasoning and the Certified Products List

Apple’s reason for not renewing is unknown. The presenter says it is unclear whether the decision was intentional, an oversight, or a sign that Apple no longer values the UNIX brand. They contacted Apple but had not received a response, and said it was not yet known whether Apple would move away from POSIX standards or Unix-like foundations.

The presenter says the certified-products list now contains nine products from IBM, HP, and SCO. HP-UX and IBM AIX are cited as examples that remain certified. The video also points to an older UNIX trademark registration that had expired, while questioning how meaningful the trademark is when relatively few companies seek certification.

No product review, guide, or tutorial is presented.