My secondary hard drive disappeared after installing El Capitan 10.11.2 update

Question

Level 1

8 points

My secondary hard drive disappeared after installing El Capitan 10.11.2 update

Hello,

My secondary internal hard drive has disappeared (can't see it on the desktop, on finder or on disk utility or on the About this Mac option) after the installation of El Capitan 10.11.2 update. I have already:

1. restarted the system

2. Reseted PRAM and NVRAM

3. Reseted the System Management Controller

It does not seem to be a hardware issue, as this hard drive was working properly before the update.

Would you have any idea of how to proceed, please?
Thanks,

gus

VIN,iMac (21.5-inch Late 2009), OS X El Capitan (10.11.2)

Posted on Dec 20, 2015 4:00 AM

Reply

Answer 1

Linc Davis

Level 10

209,739 points

Dec 20, 2015 1:15 PM in response to guspm

Is the drive formatted for Windows (as NTFS)? If so, have you installed third-party software to make the drive writable in OS X?

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Answer 2

guspm Author

Level 1

8 points

Dec 21, 2015 3:51 AM in response to Linc Davis

No, it was formatted for Mac and was working properly until the last El Capitan update. I was able to access it, read files and also write on it.

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Answer 3

Linc Davis

Level 10

209,739 points

Dec 21, 2015 6:24 AM in response to guspm

Is the volume listed in Disk Utility?

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Answer 4

guspm Author

Level 1

8 points

Dec 21, 2015 7:05 AM in response to Linc Davis

No.

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Answer 5

Linc Davis

Level 10

209,739 points

Dec 21, 2015 7:50 AM in response to guspm

Please start up in Recovery mode and launch Disk Utility. Is the drive listed now?

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Answer 6

guspm Author

Level 1

8 points

Dec 21, 2015 8:04 AM in response to Linc Davis

Unfortunately, no.

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Answer 7

Linc Davis

Level 10

209,739 points

Dec 21, 2015 8:40 AM in response to guspm

Then the drive isn't working.

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Answer 8

Jan 15, 2016 10:26 AM in response to Linc Davis

I've got the exact same problem after updating to 10.11.2!

My second hdd in my MacBook Pro suddenly disappears within 10 minutes after booting. I just gets ejected. If I put the hdd into an external bay and connect it via USB it is just working fine, so the hdd IS working. It must be some kind of controller problem. I used the same drive in an MacBook Pro 2010 and MacBook Pro 2012 before the update and it was working fine.

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