Amazon.com: USB SD Card Reader, USB 3.0 Micro SD Card Adapter, SD Card to USB Adapter, Memory Card Reader, Vanja SD Reader for SD/TF/Micro SD/SDXC/SDHC/MMC/RS-MMC/UHS-I Card, for Mac OS Windows Linux PC
Micro SD card adapter that travels inside your MacBook's SD card reader - Jiri Brejcha