In Mac OS, How to list all functions used by executable from dynamic library?

Question

I tried to override network socket related function in Mail app. But I'm not sure if Mail app uses Core foundation socket or POSIX socket.

I use otool -l to find dynamic loaded library in LC_LOAD_DYLIB section. However, I want to know what exact functions it calls.

Answer 1

nm will show you the imported symbols. Use nm -ufm /Applications/Mail.app/Contents/MacOS/Mail to get symbols and the libraries/framework they came from.