I recently purchased the MX100 512GB SSD and am having considerable problems installing it onot my Macbook pro 13" mid-2012 model. I have used an enclosure to format and clone the drive and have even loaded yosemite onto the SSD externally. While it is connected to the computer via a USB I can run everything ok, however when I replace the HDD in the actual laptop it will not boot (I get the "stop sign of doom" - not the apple or the folder with the question mark). I see a few people who replaced the SATA cable, however I'm not sure this is the issue, as when I place my original HDD back into the laptop I can get normal (albeit a slow and painful) startup. Any sugeestions/solutions would be appreciated.
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