MacBook Pro (Retina, 13-inch, Mid 2014), OS X El Capitan (10.11.4)
Posted on Apr 9, 2016 11:25 AM
Q: can i use a Transcend TS64GSDU3 64 GB SDXC UHS Ultra High Speed Class 3 Memory Card in my macbook pro
Should be fine:
About the SD and SDXC card slot - Apple Support