The Corsair CMSA16GX3M2A1333C9 Laptop Memory Kit gives you two modules of DDR3 memory with 8GB each to provide you with higher computing capabilities. This upgrade is a very cost-effective solution for your Mac's memory needs, providing you with a vast amount of memory to handle resource-demanding software. Run your photo and video editing software tasks with blazing speed to get higher productivity. Each module is tested for quality so you are ensured of its promising features.