Note that darwin prevents dylib injection in certain scenarios.

https://web.archive.org/web/20161007013145/http://pewpewthes...

IIRC it has been further tightened since the above was written. DYLD_INTERPOSE is now a thing, DYLD_LIBRARY_PATH and DYLD_INSERT_LIBRARIES may be silently ignored and dropped from the env.

https://apple.stackexchange.com/questions/421306/exporting-d...