16GB Total. two 8GB PC3-128000 204 pin SODIMM DDR3 1600MHz Genuine CMS brand, CMS is one of the most trusted names in the Computer Memory industry and this product carries a Lifetime Warranty from
CMS MAX MEMORY: 16GB SOCKETS 2
COMPATIBLE WITH: 4 GB of RAM is installed as two 2 GB modules, no slots free. Mid-2012 13" - MD101LL/A - MacBookPro9, 2 - A1278 - 2554 Apple MacBook Pro "Core i5" 2.5 13" Mid-2012