Index: sys/i386/i386/machdep.c
===================================================================
--- sys/i386/i386/machdep.c	(revision 254924)
+++ sys/i386/i386/machdep.c	(working copy)
@@ -277,6 +277,7 @@
 		    strncmp(sysenv, "MacBookPro1,1", 13) == 0 ||
 		    strncmp(sysenv, "MacBookPro1,2", 13) == 0 ||
 		    strncmp(sysenv, "MacBookPro3,1", 13) == 0 ||
+		    strncmp(sysenv, "MacBookAir6,1", 13) == 0 ||
 		    strncmp(sysenv, "Macmini1,1", 10) == 0) {
 			if (bootverbose)
 				printf("Disabling LEGACY_USB_EN bit on "