diff --git a/neo/renderer/RenderSystem_init.cpp b/neo/renderer/RenderSystem_init.cpp
index a8b900c6..eeaddcff 100644
--- a/neo/renderer/RenderSystem_init.cpp
+++ b/neo/renderer/RenderSystem_init.cpp
@@ -279,7 +279,7 @@ PFNGLDEPTHBOUNDSEXTPROC                 qglDepthBoundsEXT;
 
 // DG: couldn't find any extension for this, it's supported in GL2.0 and newer, incl OpenGL ES2.0
 // SE: only the ATI implementation is provided on Mac OS X 10.4 and 10.5
-#if (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED <= 1050)
+#if OSX_TIGER || OSX_LEOPARD
 PFNGLSTENCILOPSEPARATEATIPROC qglStencilOpSeparate;
 #else
 PFNGLSTENCILOPSEPARATEPROC qglStencilOpSeparate;
@@ -403,12 +403,12 @@ static void R_CheckPortableExtensions( void ) {
 	if ( glConfig.twoSidedStencilAvailable )
 		qglActiveStencilFaceEXT = (PFNGLACTIVESTENCILFACEEXTPROC)GLimp_ExtensionPointer( "glActiveStencilFaceEXT" );
 
-#if (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED <= 1050)
+#if OSX_TIGER || OSX_LEOPARD
 	if( glConfig.glVersion >= 2.0) {
-		common->Printf( "... got GL2.0+ glStencilOpSeparate()\n" );
+		common->Printf( "... got GL2.0+ glStencilOpSeparateATI()\n" );
 		qglStencilOpSeparate = (PFNGLSTENCILOPSEPARATEATIPROC)GLimp_ExtensionPointer( "glStencilOpSeparateATI" );
 	} else {
-		common->Printf( "... don't have GL2.0+ glStencilOpSeparate()\n" );
+		common->Printf( "... don't have GL2.0+ glStencilOpSeparateATI()\n" );
 		qglStencilOpSeparate = NULL;
 	}
 #else
diff --git a/neo/renderer/qgl.h b/neo/renderer/qgl.h
index 19be73df..9f3aac97 100644
--- a/neo/renderer/qgl.h
+++ b/neo/renderer/qgl.h
@@ -97,7 +97,7 @@ extern	PFNGLACTIVESTENCILFACEEXTPROC	qglActiveStencilFaceEXT;
 
 // DG: couldn't find any extension for this, it's supported in GL2.0 and newer, incl OpenGL ES2.0
 // SE: only the ATI implementation is provided on Mac OS X 10.4 and 10.5
-#if (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED <= 1050)
+#if OSX_TIGER || OSX_LEOPARD
 extern PFNGLSTENCILOPSEPARATEATIPROC qglStencilOpSeparate;
 #else
 extern PFNGLSTENCILOPSEPARATEPROC qglStencilOpSeparate;
diff --git a/neo/sys/platform.h b/neo/sys/platform.h
index c5d2455b..59e93f8c 100644
--- a/neo/sys/platform.h
+++ b/neo/sys/platform.h
@@ -202,6 +202,13 @@ If you have questions concerning this license or the applicable additional terms
 
 #ifdef __APPLE__
 #include <Availability.h>
+#ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
+#if __MAC_OS_X_VERSION_MIN_REQUIRED == 1040
+#define OSX_TIGER 1
+#elif __MAC_OS_X_VERSION_MIN_REQUIRED < 1060
+#define OSX_LEOPARD 1
+#endif
+#endif
 #endif
 
 #define ID_TIME_T time_t
diff --git a/neo/sys/posix/posix_main.cpp b/neo/sys/posix/posix_main.cpp
index 15f08ba2..9eaa2963 100644
--- a/neo/sys/posix/posix_main.cpp
+++ b/neo/sys/posix/posix_main.cpp
@@ -401,7 +401,7 @@ int Sys_GetDriveFreeSpace( const char *path ) {
 static const int   crashSigs[]     = {  SIGILL,   SIGABRT,   SIGFPE,   SIGSEGV };
 static const char* crashSigNames[] = { "SIGILL", "SIGABRT", "SIGFPE", "SIGSEGV" };
 
-#if ( defined(__linux__) && defined(__GLIBC__) ) || defined(__FreeBSD__) || (defined(__APPLE__) && !(__MAC_OS_X_VERSION_MIN_REQUIRED <= 1040))
+#if ( defined(__linux__) && defined(__GLIBC__) ) || defined(__FreeBSD__) || (defined(__APPLE__) && !OSX_TIGER)
   #define D3_HAVE_BACKTRACE
   #include <execinfo.h>
 #endif