M. 2 Dual-Bay Duplicator can not only be used as general external SSD Reader/Writer, but also as an Offline 2013-2015 Mac Achi SSD to M. 2 NVMe or nVMe to nVME Duplicator to clone data between Two SSDs by one-click without a computer, it is convenient tool to upgrade SSD of MacBook Air Imac (Mid 2013-2016) and PRO(Late 2013 - Mid 2015)