I see that the OP asked this some time ago so this is probably irrelevant but since creamz posting bumped it to the 1st page here are my two cents. The OWC drives are run in RAID and show up as an external drive for the late 2013 and later drives. This also means you can't use them in Bootcamp. Another thing to consider is that the 1TB OWC drive is noticeably slower than Apple's 1TB, especially the new 2015 drives (the 1TB drives have been 4x lane since late 2013). Personally I would spend more and source an OEM system pull. The OWC has too many shortcomings.