Early 2011 model, A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor.

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Why MacBook Pro Early 2011 crashes during Macos Sierra install

My Macbook pro crashes during sierra installation. I took the hard drive out and installed it on another mac but the problems continued after I put it back in the machine:

pictures below of the kernal panics;

Block Image

Block Image

Could this be GPU or CPU failure?

Answered! View the answer I have this problem too

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It was the Ram that was bad in mine. Not the data cable

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This sounds like a bad HD SATA cable.

Here is the IFIXIT guide you'll need to follow: MacBook Pro 13" Unibody Early 2011 Hard Drive Cable Replacement

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Do you think replacing the hdd cable will solve the random crashes and kernel panics?

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This series had a big problem with the SATA cable. I would recommend replacing first. Here is the part you want: MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable this is the newer better version. I would also apply some tape on the uppercase where the cable sits.

You may need to reformat the drive and apply a fresh copy of the OS as well as the files may have some corruptions which is why you're getting panics.

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Well? Did the new SATA cable fix the issue?

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I'm sure it did ;-}

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I substitute the 2012 cable instead of using the 2011. Occasionally I have to mod the hard drive retains bracket.

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