+#define kIONVRAMForceSyncNowPropertyKey "IONVRAM-FORCESYNCNOW-PROPERTY"
+
+// GUID to address variables for the system NVRAM region
+#define kIOKitSystemGUID "40A0DDD2-77F8-4392-B4A3-1E7304206516"
+#define kIOKitSystemGUIDPrefix (kIOKitSystemGUID ":")
+// Internal only key to give access to system region on internal builds
+#define kIONVRAMSystemInternalAllowKey "com.apple.private.iokit.system-nvram-internal-allow"