Hey guys On the next few days i'll be taking my 21.5 mid2011 iMac to tech support to perform a SSD installation. As i'm paying for the installation, i'm thinking to include a CPU upgrade for my Mac. My iMac has a I5-2500S, 2.7GHz and i would like to upgrade to a I7, so i can enjoy the benefits of Hyper Treading. I was thinking to upgrade to a Sandy Bridge I7-2600 or even a 2700k (i know i won't be able to overclock it, but the 2700 has a higher clock than the 2600). My other option is upgrade to a Ivy Bridge processor, as the I7-3770, but i read some threads about people who did a successful upgrade to this I7 and who didn't. Facing this facts i have some questions: 1. The I7-2600 and the I7-2700k TDPs are higher than the stock I5-2500S TDP. This is a huge problem or it would work flawlessly? (From intel website, the other option to upgrade could be a I7-2600S, which has the same TDP of the 2500S) 2. About the Ivy Bridge upgrade: i read about one guy who did the upgrade and had success, but a lot of other guys who did this upgrade and failed. Any other guys who did this upgrade had success? 3. About all this CPU upgrade, i read about that the CPU upgrade works without a problem in OSX Lion, but in Mountain Lion don't, but i didn't find any consistent information about mavericks. Anybody who performed the CPU upgrade and has Mavericks running on their machines are having any problems?