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I am having trouble upgrading my MacBook Pro (mid 2012, 13") with a SSD.

3 weeks ago, I installed the Samsung Evo 840 (500 GB) into my MacBook Pro. It worked fine for 3 weeks, then two days ago, my MacBook freezes. I restart it, and a Finder symbol with a question mark appears. I open Disk Utility in several ways (connected my old HDD through USB, or used cmd + R), it shows the SSD but I can neither repair nor verify it. When I start the MacBook Pro, it tells me that it cannot read the internal SSD (or something similar).

Then, I installed the MX100 Crucial SSD (500 GB). It works fine from USB, but once I install it inside my MacBook Pro, I again get the Finder symbol with a question mark. Same for the Samsung: it works via USB, but once its inside, I cannot boot from it.

I installed the HDD back into the MacBook Pro, and it works fine.

I didn't find anything similar to my problem on the web, so I'm asking here. What could be the problem?

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I'm guessing the problem is the cable that connects your hard drive to the logic board. You can order a new one from eBay, Amazon, or other Apple suppliers, or set an a Genius Bar appointment to have them diagnose and see if it is the issue.

A family member and I both had similar issues with our MacBooks.

  • I now have an appointment tomorrow and will update on the status. – MariaMaria Oct 23 '14 at 18:45
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    They exchanged the bracket in my MacBook, now it's working. You were right! – MariaMaria Oct 26 '14 at 5:16

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