diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index efedcfd9d69d..afd008688ae4 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -250,9 +250,11 @@ cpu_startup(dummy)
 	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 "
diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c
index a00a74e1cc20..ed7b072c7839 100644
--- a/sys/i386/i386/machdep.c
+++ b/sys/i386/i386/machdep.c
@@ -273,9 +273,11 @@ cpu_startup(dummy)
 	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 "