diff --git a/adm/cmake/TKernel/CMakeLists.txt b/adm/cmake/TKernel/CMakeLists.txt
index 54e241e..72873c6 100644
--- a/adm/cmake/TKernel/CMakeLists.txt
+++ b/adm/cmake/TKernel/CMakeLists.txt
@@ -29,7 +29,7 @@ if(WIN32)
 	set(TOOLKIT_LIBS ${TOOLKIT_LIBS} ${CSF_SOCKETLibs_LIB} ${CSF_advapi32_LIB} ${CSF_gdi32_LIB} ${CSF_user32_LIB} ${CSF_kernel32_LIB} ${CSF_psapi_LIB})
 else(WIN32)
 	#  An implementation for Mac OS X has been added in src/OSD/gettime_osx.h
-	if(NOT APPLE)
+	if(APPLE)
 		include( CheckFunctionExists )
 		check_function_exists( clock_gettime CLOCK_GETTIME_IN_LIBC )
 		if(NOT CLOCK_GETTIME_IN_LIBC)
@@ -40,7 +40,7 @@ else(WIN32)
 			endif(NOT CLOCK_GETTIME_IN_LIBRT)
 			set(TOOLKIT_LIBS ${TOOLKIT_LIBS} rt)
 		endif(NOT CLOCK_GETTIME_IN_LIBC)
-	endif(NOT APPLE)
+	endif(APPLE)
 endif(WIN32)

 # Adde-DHAVE_TBB in TKernel in order to benefit from Standard_MMgrTBBalloc
@@ -70,4 +70,3 @@ if (OCE_BUILD_TKERNEL_WITH_INSTALL_RPATH)
 	set_target_properties_install_rpath(${TOOLKIT} "${OCE_INSTALL_LIB_DIR_RPATH};${OCE_INSTALL_PACKAGE_LIB_DIR_RPATH}")
 	set_target_properties(${TOOLKIT} PROPERTIES BUILD_WITH_INSTALL_RPATH ON)
 endif ()
-
diff --git a/src/OSD/OSD_Chronometer.cxx b/src/OSD/OSD_Chronometer.cxx
index 444f844..25970d0 100644
--- a/src/OSD/OSD_Chronometer.cxx
+++ b/src/OSD/OSD_Chronometer.cxx
@@ -51,7 +51,7 @@
   #include <mach/mach.h>
 #endif

-#if defined(__APPLE__) && defined(__MACH__)
+#if defined(__OOOOPPLE__) && defined(__MACH__)
 #include "gettime_osx.h"
 #endif

@@ -283,4 +283,3 @@ void OSD_Chronometer::Show (Standard_Real& user,
   system = Cumul_sys;
   if (!StopSav) Start();
 }
-