Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM

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Replaced hard drive with Samsung SSD 500GB

After I put the new HD in and partitioned the drive, the install took forever, multiple hours. Once it finally finished the computer was crawling. I mean slow... every click the wheel would come up and spin. It's a brand new HD.

My previous HD failed... hardware test came back with 4HDD/11/40000004:SATA(0,0)

So I am starting from scratch with no back up

Answered! View the answer I have this problem too

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You're hitting a known issue here! You'll need to replace the SATA cable. I bet if you put the old drive into a case or use a SATA to USB adapter you can still gain access to the files.

Here's the IFIXIT guide you'll need to follow: MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement and here's the part you'll need: MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable - Apple P/N 923-0104.

Once you replace the cable you should reformat the SSD and re-install the OS.

MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable Image

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Comments:

Thanks Dan! I will give that a try.

Thanks again.

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Let us know how it goes!

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The cable was the problem! Swapped it out and was able to get back into my old HDD.

Thanks again!

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Chris will be eternally grateful.
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