I watched a video on one of the Mac-centric upgrade websites on how to perform the physical installation of replacement hard drive. I think the video was for an SSD physical install, but I would imagine it is the same for a SSD. Anyway, while trying to find a shop to do this for me, I was wondering if the standard off the shelf Samsung EVO 850, if bought in 1TB size, can make for an upgrade, and how might go about the migration. Considering the age of the iMac, bought in October 2011, I presume the connectors are the same SATA connectors. I think Samsung makes OS X compatible Migration software, but I wondered if anyone had personal experience. I've used Samsung EVO 840/850 in Windows and Linux, and their migration software in W7 is nice, but I didn't know about the OS X/iMac environment.