Remove CGO on MacOS (far future)

[MatejMagat305]

Of course if we can / should then perhaps a new issue to track that would make sense?

Originally posted by @andydotxyz in #911 (comment)

it is (will) really far future and I do not know whether it is suitable for this library (I mention mainly therefore, it is interesting option to progress of graphic), people of library ebiten found way how remove cgo from MacOs(they are creating own "dlopen" "extension"): hajimehoshi/ebiten#2091, ebitengine/purego#1.
It depend on shared library, which open with their own (pure go) "dlopen" and "dlsym", It has advantage at build it is not nessery CGO, on the other hand it has disadvantage too, it need shared library at runtime, so I do not know ..., if yes, it will be very far future