In principle, with an adapter and Micro SD chip card to expand a good idea the disk space of MacBooks. Unfortunately, the quality of the adapter is so bad that even the 2nd copy the thin plastic wall is torn. This keeps the micro-chip card is no longer in the adapter and is therefore no longer mounted. Annoying after about half a year and use only very rare removing the adapter. Otherwise the silver colored Photofast adapter would hardly notice if he would not 2mm protruding from the MacBook Pro enclosure. Sorry, no buy recommendation. There are better processed products of the competition, the finish also clean the MacBook case.