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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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Upgraded to SSD problems

I just upgraded from my stock HD to a 500gb Samsung860 evo SSD. Install went smoothly some problems with downloading the OS but got it working. Now after about a day of having it in it started to develop some problems, 1 it will be running normally then it will just completely freeze up, which I restart and it gods back to normal. 2. I’ll get a black screen where my pointer is still visible. 3rd I’tll be running normally then I’ll get a folder with a blinking question mark on it.

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Replace your hard drive I/R cable. Put pads on either side of the cable as it climbs onto the optical drive to prevent the bottom from touching it. I use 3M extreme mounting tape to do this. For a while last year Apple was replacing this cable for free.

\MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement

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17 Comments:

To add to @mayer 's answer place some electrical tape on the uppercase where the cable rests as the rough aluminum surface wears the cable as well.

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Thank you for your prompt reply, I bought a new IR and just finished Installing and to my dismay the problem still persists, any ideas?

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@g2raw - Lets see if the system will run with this drive externally. You'll need a HD case FireWire or Thunderbolt being the better. Or USB to SATA adapter cable or case.

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@danj just got it, no crashes or anything when plugged in externally

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Then you've isolated the issue back to the HD SATA cable. You could have damaged the replacement or it was just a bad cable from the get go.

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George P will be eternally grateful.
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