Nifty MD3-RP-R15SR4G Minidrive microSD 4GB Memory Card for Apple Macbook Pro Retina silver (Accessories)
I have this Nifty Drive ordered for my MacBook Pro Retina 15 "Late 2013, and it fits perfectly. I had already must send back an order of another Nifty Drives, as it in the built-in card reader is not completely into fit and thus a couple of millimete