Initial OS X support.

CMakeLists.txt

@@ -70,6 +70,8 @@ if (WIN32)
     set(SOURCES_OS win/cpu_win.c win/memory_win.c win/xmrig_win.c win/app.rc compat/winansi.c)
     set(EXTRA_LIBS ws2_32)
     add_definitions(/D_WIN32_WINNT=0x600)
+elseif (APPLE)
+    set(SOURCES_OS mac/cpu_mac.c mac/memory_mac.c mac/xmrig_mac.c)
 else()
     set(SOURCES_OS unix/cpu_unix.c unix/memory_unix.c unix/xmrig_unix.c)
     set(EXTRA_LIBS pthread)
@@ -136,4 +138,3 @@ else()
     target_link_libraries(xmrig32 jansson curl ${CPUID_LIB} ${EXTRA_LIBS})
 endif()
 
-source_group("HEADERS" FILES ${HEADERS})