@@ -234,15 +234,20 @@
 #endif
 
 	if (!uname(&name)) {
 	    tkMacOSXMacOSXVersion = (strtod(name.release, NULL) + 96) * 10;
 	}
-	if (tkMacOSXMacOSXVersion &&
+       /*Check for new versioning scheme on Yosemite (10.10) and later.*/
+	if (MAC_OS_X_VERSION_MIN_REQUIRED > 100000) {
+		tkMacOSXMacOSXVersion = MAC_OS_X_VERSION_MIN_REQUIRED/100;
+	    }
+	if (tkMacOSXMacOSXVersion && MAC_OS_X_VERSION_MIN_REQUIRED < 100000 &&
 		tkMacOSXMacOSXVersion/10 < MAC_OS_X_VERSION_MIN_REQUIRED/10) {
 	    Tcl_Panic("Mac OS X 10.%d or later required !",
 		    (MAC_OS_X_VERSION_MIN_REQUIRED/10)-100);
 	}
+	
 
 #ifdef TK_FRAMEWORK
 	/*
 	 * When Tk is in a framework, force tcl_findLibrary to look in the
 	 * framework scripts directory.