Crucial - DDR3 - kit - 4 GB: 2 x 2 GB - SO-DIMM 204-pin - 1066 MHz / PC3-85

Engineered to be compatible with your Apple system, Crucial Memory for Mac takes the guesswork out of a memory upgrade. Since Apple systems often have very specific memory requirements, including particular component densities, speeds, and SPD programming specifications, it's important to buy your memory from people who know Apple computers inside and out. With over a decade of experience manufacturing and developing memory for Apple systems, Crucial makes it easy to find memory that's been designed specifically for your system.

If you're an Apple computer user, you probably expect intuitive, reliable performance from your system. Crucial thinks memory should work the same way, too. For each module it manufactures, Crucial sends it through a rigorous testing process to ensure that you're getting a reliable, high-performance memory solution. Every module that leaves the doors has been extensively tested at the component level for voltage and temperature resistances, signal integrity, and software compatibility