Index: sys/amd64/amd64/machdep.c
===================================================================
--- sys/amd64/amd64/machdep.c	(revision 271051)
+++ sys/amd64/amd64/machdep.c	(working copy)
@@ -254,9 +254,11 @@
 	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 ||
+		    strncmp(sysenv, "MacBookPro4,1", 13) == 0 ||
 		    strncmp(sysenv, "Macmini1,1", 10) == 0) {
 			if (bootverbose)
 				printf("Disabling LEGACY_USB_EN bit on "
Index: sys/i386/i386/machdep.c
===================================================================
--- sys/i386/i386/machdep.c	(revision 271051)
+++ sys/i386/i386/machdep.c	(working copy)
@@ -277,9 +277,11 @@
 	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 ||
+		    strncmp(sysenv, "MacBookPro4,1", 13) == 0 ||
 		    strncmp(sysenv, "Macmini1,1", 10) == 0) {
 			if (bootverbose)
 				printf("Disabling LEGACY_USB_EN bit on "