How to load a . bundle file for Mac OS?

I’m trying to load a .bundle file which contains the function calls to native Mac functions that I want to access in unreal.

I’ve done something similar with Windows where I can load a .DLL and I’ve successfully done and used that. But how does one do that for Mac?

Should I build a .a file instead or is .bundle fine?
A . framework maybe?

Anyone know how?