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

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My MacBook Pro isn't recognising my new HD replacement

MacBook Pro 13" Mid 2012 2.5GHz Intel Core i5

My standard 500GB Apple HD recently died on my a few weeks ago, coming up with the dreaded question mark on startup.

So I did a bit of research and bought a new one. It's a Western Digital 750GB, 7200 rpm hard drive, and using one of the iFixit guides I replaced the broken one with the WD. But I still get the question mark. So I tried Internet Recovery, and that didn't work either, because Disk Utility doesn't recognise that there is any internal HD.

I'm not sure of the new HD's formatting. I have a backup of my system before it died (Mac OSX Mavericks) but when I went to restore it, again, my computer said there was no HD to restore it to. And it's the same story when I went to re-install OSX. What could have happened? I should also note that my HD has been replaced numerous times.

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At this point I would replace the SATA cable. Apple & some 3rd parties had gotten some bad cables. It's possible your issue was the cable Vs the HD it's self.


Yes - Follow this IFIXIT guide [http://Yes - Follow this IFIXIT guide: MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement

And here's the part from IFIXIT: MacBook Pro 13" Unibody (Model A1278 Mid 2012) Hard Drive Cable

If you want to prove its the cable I would use something like IFIXIT's Universal Drive Adapter to connect your HD to your system externally.

Universal Drive Adapter Image


Universal Drive Adapter


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


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


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Thanks Dan, I needed that. So you would recommend I replace the SATA cable?


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