8GB Dual Channel Kit 2x 4GB SAMSUNG Original 204 pin DDR3-1333 PC3-10600 CL9 DDR3 SO-DIMM for current i5 + i7 notebooks with DDR3-1333MHz support (electronics)
Did the Macbook my wife upgraded so, after the computer by downloading from Mountain Lion needed more time to boot up. Installation worked perfectly, open back with small Kreuschschlitz, disconnect battery cables, Dimms pure and ready. Were the messenger immediately recognized, and the annoying spinning ball when opening larger programs belongs to the past. Computer has become much faster. Strong buy recommendation, and trust you if you're playing with the idea. Is really easy. Construction manual is also available at ifixit.com.