The SPDM and secured message libraries follow : DSP0274 Security Protocol and Data Model (SPDM) Specification (version 1.0.2, version 1.1.4, version 1.2.3, version 1.3.2, and version 1.4.0) DSP0277 ...
macOS Golden Gate (27.x) and newer will NOT work, as Apple has dropped support for the x86 architecture. Other ARM-based CPUs are not supported either, due to Apple's custom M-series instructions.