--- machdep.c.new	2014-07-07 06:58:34.117467335 -0500
+++ machdep.c.new	2014-07-07 06:59:31.351459472 -0500
@@ -235,6 +235,7 @@ 
 	if (sysenv != NULL) {
 		if (strncmp(sysenv, "MacBook1,1", 10) == 0 ||
 		    strncmp(sysenv, "MacBook3,1", 10) == 0 ||
+		    strncmp(sysenv, "MacBook4,1", 10) == 0 ||
 		    strncmp(sysenv, "MacBookPro1,1", 13) == 0 ||
 		    strncmp(sysenv, "MacBookPro1,2", 13) == 0 ||
 		    strncmp(sysenv, "MacBookPro3,1", 13) == 0 ||