"5.0 out of 5 stars My iMAc 27,(Mid 2011) loves this product., October 4, 2012 By Julmen - See all my reviews Amazon Verified Purchase(What's this?) This review is from: Corsair 16GB Dual Channel DDR3 SODIMM Memory Kit (CMSO16GX3M2A1333C9) (Personal Computers) Processor 3.4 Ghz i7 **Memory 32GB 133 MHz DDR3 (CORSAIR) Graphics AMD Radeon HD 6970M 1024MB Software OS X 10.8.2 Do not hesitate to buy it. I am happy with this purchase. The delivery was fast. The quality is really good, and price is not bad! :) Help other customers find the most helpful reviews Was this review helpful to you? Yes No Report abuse | Permalink Comment Comment"
I installed this RAM in my Mid 2011 iMac with no problems. I already had 4 GB of RAM factory installed, with 2 extra slots available. I added this RAM to the other 2 slots and rebooted. Now my iMac is showing 20 GB of RAM. Huge improvement using iPhoto, Photoshop, pretty much anything I throw at it.