Installing a Samsung 830 SSD in my iMac 27 (Mid 2011 - EMC 2429)
Speed up teh IMac with a SSD
Worked mostly as decribed in the guide, but you have to disconnect the antenna cables from the AirPort Card. Fortunately there is a guide for installing the AIrport Card which describes te reconnection of the wires.
You have te enable TRIM support on non-Apple SSD's. I Used "Trim Enabler" from Oskar Groth.