One 8GB 1333MHz memory module that isspecifically designed and SPD configured for your Mac.This module is compatible with the latest Apple Firmware.
Specifications: 8GBDDR3-1333, 1333Mhz, PC3-10600, CAS Latency 9, Non-ECC, Unbuffered, 1.5V, 204pin SO-DIMMs
Watch our installation video:
Click here for Apple's installation guide (PDF.)