Apple/macOS removed from official Unix registry

The Open Group, creators of the UNIX trademark, have removed Apple and macOS from the official UNIX registry. Compliance with the Single UNIX Specification is a prerequisite for using the UNIX® trademark. The Open Group offers UNIX certification to ensure the highest level of stability, portability, and cost-effectiveness for application development across various platforms.

Certified UNIX systems provide end-user enterprises with increased availability, scalability, and maintainability. The UNIX trademark is a trusted and open industry standard, guaranteeing products meet stringent criteria for portability, compatibility, and global interoperability. This certification benefits buyers by allowing them to specify UNIX conformance in procurement processes, facilitate Boundaryless Information Flow, and enhance the perception of the UNIX system as a reliable and flexible operating system.