Mid 2012 Macbook Pro 13-inch partition map corrupted

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Level 1

8 points

Mid 2012 Macbook Pro 13-inch partition map corrupted

I have been plugging in my external hard disk which runs Fedora 24 quite frequently past a couple of days. I use the option key during boot to choose the operating system. So now my OS X El Capitan wont turn on due to a partition error. I fixed this using the internet recovery, but I'm 100% sure this issue will come up soon. Is there a fix for this? What is the cause of this issue?

Macbook Pro Mid-2012 13'' Specs:

OS: El Capitan 10.11.6

Processor: i5 2.5 GHz

Storage: 500 GB HDD

Memory: 16 GB (Max upgrade for this model stated by Apple is 8GB but 3rd party vendor OWC makes a customized 16GB for this specific model)

Any suggestions/comments would be appreciated.

MacBook Pro (13-inch Mid 2012), OS X El Capitan (10.11.6)

Posted on Aug 27, 2016 6:51 PM

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Answer 1

John Galt

Level 10

156,968 points

Aug 27, 2016 7:28 PM in response to ckovuri

Is there a fix for this?

Yes, a replacement hard disk drive. They are not terribly expensive and replacement is simple.

What is the cause of this issue?

Contamination, mechanical damage, age... any of those factors.

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Answer 2

ckovuri Author

Level 1

8 points

Aug 27, 2016 8:01 PM in response to John Galt

Please correct me if I'm wrong. I believe the internal hard disk is just fine. All i had to wipe reinstall the OS and it started working again. So i was thinking this was more of a software issue than an hardware issue.

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Answer 3

John Galt

Level 10

156,968 points

Aug 27, 2016 9:49 PM in response to ckovuri

It is completely normal to use Startup Manager to choose a different boot volume. You did nothing to bring on the problem.

The hard disk is in a failed state. Its partition map will become corrupted again, probably in a very short period of time. Discard the drive; it cannot be fixed.

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