macOS 15 Sequoia is now officially certified as a UNIX variant by The Open Group, marking Apple's continual evolution in operating system compliance.
Despite its UNIX certification, macOS does not utilize any original AT&T source code, reflecting the significant changes UNIX has undergone since its acquisition by Novell in 1993.
Certification now signifies compliance with POSIX compatibility standards, which revolve around having specific tools in proper locations rather than adhering to original UNIX source code.
Apple's macOS Sequoia garners significant attention as it holds the first two spots on The Open Group's UNIX Certified Products list, with separate entries for different architecture versions.
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