This project can bring OpenGL 4.4 in MacOS:
Regal for OpenGL
Regal is a user-space OpenGL layer for OpenGL 2.x, 3.x, 4.x, Core contexts and ES 2.0. Regal implements OpenGL loading, emulation for ES and Core contexts and tools for debugging.
Can this be used to bring support for OpenGL 4.2 in MacOS?