Index: trunk/i386/boot2/boot.c
===================================================================
--- trunk/i386/boot2/boot.c	(revision 2426)
+++ trunk/i386/boot2/boot.c	(revision 2427)
@@ -209,7 +209,7 @@
 	finalizeBootStruct();
 
 	// Jump to kernel's entry point. There's no going back now.
-	if ((checkOSVersion("10.7")) || (checkOSVersion("10.8")) || (checkOSVersion("10.9")))
+	if ( LION || MOUNTAIN_LION || MAVERICKS )
 	{
 
 		// Notify modules that the kernel is about to be started
@@ -254,12 +254,12 @@
 		verbose("Specified kernel cache file path = %s\n", cacheFile);
 	} else {
 		// Lion, Mountain Lion and Mavericks prelink kernel cache file
-		if ((checkOSVersion("10.7")) || (checkOSVersion("10.8")) || (checkOSVersion("10.9")))
+		if ( LION || MOUNTAIN_LION || MAVERICKS )
 		{
 			snprintf(kernelCacheFile, sizeof(kernelCacheFile), "%skernelcache", kDefaultCachePathSnow);
 			verbose("10.7, 10.8 & 10.9 kernel cache file path = %s\n", kernelCacheFile);		}
 		// Snow Leopard prelink kernel cache file
-		else if (checkOSVersion("10.6")) {
+		else if ( SNOW_LEOPARD ) {
 			snprintf(kernelCacheFile, sizeof(kernelCacheFile), "kernelcache_%s",
 				(archCpuType == CPU_TYPE_I386) ? "i386" : "x86_64");
 
Index: trunk/i386/boot2/boot.h
===================================================================
--- trunk/i386/boot2/boot.h	(revision 2426)
+++ trunk/i386/boot2/boot.h	(revision 2427)
@@ -28,6 +28,16 @@
 #define __BOOT2_BOOT_H
 
 #include "libsaio.h"
+
+// OS X Versions
+
+#define MAVERICKS       checkOSVersion("10.9")  // Mavericks
+#define MOUNTAIN_LION   checkOSVersion("10.8")  // Mountain Lion
+#define LION            checkOSVersion("10.7")  // Lion
+#define SNOW_LEOPARD    checkOSVersion("10.6")  // Snow Leopard
+#define LEOPARD         checkOSVersion("10.5")  // Leopard
+#define TIGER           checkOSVersion("10.4")  // Tiger
+
 /*
  * Paths used by chameleon
  */
Index: trunk/CHANGES
===================================================================
--- trunk/CHANGES	(revision 2426)
+++ trunk/CHANGES	(revision 2427)
@@ -1,3 +1,4 @@
+- ErmaC : define macro for OS X Versions
 - Slice and Clover Team : Replace "NULL" terminated strings and fit Boot2 Sectors size
 - ErmaC : Update bootargs
 - crazybirdy : Fit length for "Loading Darwin"