Late 2011 model, A1278 / 2.4 GHz i5 or 2.8 GHz i7 processor.

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My 1TB Samsung 850 EVO Fails to boot internally

So, about a month a go i bought a Samsung 850 EVO (1TB) . Suddenly my new SSD starts to boot very slow and at some point will freeze up my laptop. Upon research, i manage to find a way to boot it up with via usb with this and works perfectly. But when i place it in internally it won't boot up. Any Help?


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Probable bad hard drive cable. Replace with a new one from the 2012 13" model. Buy a new cable only!

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

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


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


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Many thanks @mayer But do i need to buy with bracket?


No you already have the bracket. You just flip up the cable lock on it, use a pocket knife to unstick the board and replace it.


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Sena Dzameshie will be eternally grateful.
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