I have a mid 2012 / early 2013 MacBook Pro 15" Retina A1398 model which I upgraded to 1TB courtesy of MacSales. I also got an external USB enclosure for the old SanDisk SD5SL2-512G-1205E SSD which was in there before. Now trying to find a PCIe card so I can re-use the old 512GB SSD in my 2012 Mac Pro 5,1. I think its a 7 + 17 pin and so far struggled. I suspect the MacBook Air used the same part per http://pc-adapter.net/products/833.html Anyone got any suggestions?