Hi well they say it is for mac or windows but how thick is the drive that is already in there these are the specs on all the blue mobile drives… http://www.wdc.com/en/products/products.aspx?id=800 . Your description mac book pro mid 2012 13 inch I can not look up the specs on a laptop like that you need model number. the drive you posted is 9.5 mm thick and sata 6 G/bs what is the mac book sata controller sata 6 Gb/s or Sata 3 G/bs. You best bet is to look at the specs on the link I sent you and match it with the exact model specs of your macbook.