Compatible with: MacBook Pro 2.3GHz Intel Core i7 (15" DDR3) Mid 2012 MacBook Pro 2.5GHz Intel Core i5 (13" DDR3) Mid 2012 MacBook Pro 2.6GHz Intel Core i7 (15" DDR3) Mid 2012 MacBook Pro 2.7GHz Intel Core i7 Core i7 (38.1) DDR3) Mid 2012 MacBook Pro 2.9GHz Intel Core i7 (13" DDR3) Mid 2012 iMac 2.9GHz Quad-Core Intel Core i5 (27", Late 2012) iMac 3.2GHz Quad-Core Intel Core i5 (27", Late 2012) iMac 3. 4GHz quad-core Intel Core i7 (27-inch, Late 2012) iMac 3.4GHz Quad-Core Intel Core i5 (27-inch, Late 2013) iMac 3.5GHz Quad-Core Intel Core i7 (27-inch, Late 2013) Mac Mini (Late 2012) Mac Mini 2.3GHz Quad-Core Intel Core i7 - Late 2012 Mac Mini 2.5GHz Dual-Core Intel Core i5 - Late 2012 Mac Mini 2.6GHz Quad-Core Intel Core i7 - Late 2012 Mac Mini (Intel Core i5 2.3GHz) DDR3 - Mid 2011 Mac Mini (Intel Core i5 2.5 GHz) DDR3 DDR3 3 - Mid 20 011 Mac Mini (Intel Core i7 2.0Ghz) DDR3 - Mid 2011 Server Mac Mini (Intel Core i7 2.7Ghz) DDR3 - Mid 2011 The profile shows you what kind of memory and how much memory is in your system. Open the Apple menu and then select from this Mac. The About this Mac screen opens. Click on the "More Info..." button. Hardware Overview: The system profile screen opens and shows the hardware overview. Current Storage Information: In the "Content" section on the left side of the screen, click "MEMORY". The memory space information will appear and show your current memory configuration (make sure your DDR3 is 1600 MHz). This information will help you determine which slots are filled with what type of memory, and how many slots are still available to install a new RAM memory.