Hi wow I just got my MacBook Pro back from repairs due to my keyboard had stopped working and I saw some different stuff on the whole enclosure. At first I thought maybe it was a 2010 replacement than I saw on the Mini Display port that it was a Thunderbolt symbol. Also that the sharp edges were gone they are a bit beveled. Its a 2011 enclosure but a 2010 keyboard. I thought enclosures were not backwards compatible.