The MiniDrive | microSD Adaptor | For MacBook Retina 15" Fits: MacBook Retina 15 (only) purchased before October 22, 2013. (Retina, Mid-2012 & Retina, Early 2013 - See image on left to confirm your 15" Retina's year) Quickly, simply, and discreetly increase the data storage space through use of a microSD. Sits 100% flush and fits securely into the SD slot. The Nifty MiniDrive Alternative. Shipped in easy to open OEM packaging.