Which macro to wrap Mac OS X specific code in C/C++

Question

While reading various C and C++ sources, I have encountered two macros __APPLE__ and __OSX__. I found plenty of use of __OSX__ in vari

Answer 1

See http://nadeausoftware.com/articles/2012/01/c_c_tip_how_use_compiler_predefined_macros_detect_operating_system#OSXiOSandDarwin

#ifdef __APPLE__
#include 
#if TARGET_OS_MAC
   ...
#endif /* TARGET_OS_MAC */
#endif /* __APPLE__ */

Note that __OSX__ does NOT exist, at least as of Xcode 9.

Also note that it is #if TARGET_OS_MAC not #ifdef. It is always defined, but is 0 when not macOS.