Who Maintains Posix

AbbreviationPOSIXStatusPublishedYear started1988Latest versionIEEE Std 1003.1-2017 2017OrganizationAustin Group (IEEE Computer Society, The Open Group, ISO/IEC JTC 1)

Is POSIX only for Linux?

Released in 1988, POSIX is a group of IEEE standards that define the API, shell, and utility interfaces for an operating system. Although aimed at UNIX-like systems, the standards can apply to any compatible operating system.

Is Apple a POSIX?

Mac OSX is Unix-based (and has been certified as such), and in accordance with this is POSIX compliant. POSIX guarantees that certain system calls will be available. Essentially, Mac satisfies the API required to be POSIX compliant, which makes it a POSIX OS.