Retina Early and Mid 2015 - MacBookPro12,1
Compatible upgrades for: MF839LL/A, MF841LL/A, MF843LL/A - Early 2015 13-inch Retina Macbook Pro's.
Standard RAM: 8 GB*
Maximum RAM: 16 GB*
Details: *8 GB of RAM is onboard by default, but it can be upgraded to 16 GB at the time of purchase at additional cost. RAM cannot be upgraded later.
RAM Slots: 2