i get this stupid crap all the time. most frustrating issue with this thing. Im thinking of taking it in. For no rhyme or reason, all of my other devices can access wifi and the macbook will just not do it. I regularly have to disable/reenable firewall, reset SMC/Pram, reset, renew dhcp leases just to get the stupid thing to connect, meanwhile, my iphone works just fine each time i get home. I almost thru my late2011 13inch yesterday because nothing was working.