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

1084 Questions View all

New 1TB SSHD drive not initializing. Option is greyed out in Disk Util

I just replaced an SSD drive with a 1TB SSD Drive on my mid 2012 Mac Book Pro.

The older SSD drive was my boot drive for over a year but it ran out of space.

With the new drive installed I booted from my original HD drive with Sierra installed with the hope of downloading the OS.

Instead I get a message that an internal drive can not be read by this computer. I'm asked if I would like to initialize the new drive. I click yes. Disk Utility opens and the new drive is listed but it can't be mounted. That option is grayed out. Any Ideas?

Thanks very much,

Steve Gelfand

Answered! View the answer I have this problem too

Is this a good question?

Score 0


Can you give us a bit more on which model you have here 13" or 15"?

Also, give us the make and model of SSD you're putting in.


Hi Dan

The Mac Book Pro is a 13" - mid 2012. I will have to check on the make and model of the drive . It was listed on the receipt simply as "1 TB SSD Hybrid 2.5"Hard Drive"

I will either check with ifixit to get the make and model or at first opportunity I will open the computer and check that way .

Thanks again



It is The drive is listed is Disk Utility as ST1000LM014-1EJ164 Media


Hi Dan I went to Apple today . When we booted the computer the new drive did not show up as expected . The tech then used a network cable and through their network he was able to boot my computer . Their disk utility was able to read my new drive but it came up as failed . He downloaded a system onto the drive . When we booted my computer again the new drive mounted . I was then able to go home and restore from my last time machine backup file. I'm not sure why it's unable to initialize the drive from my useraccount . .


Add a comment
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12
Spread Fixmas Cheer
Get $12 off your purchase of $50 or more with code FIXMAS12

1 Answer

Chosen Solution

To start with this series has a known issue with the HD cable. It tends to break down.

I would go to an Apple Store or Apple authorized service center to have the cable replaced for Free! As Apple has been quietly replacing them. If that is not an option, here is the IFIXIT guide: MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement and here is the part you'll need: MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable

Don't try to run anything until you get the cable replaced as you can do permanent damage to the drive.

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


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


Was this answer helpful?

Score 2


Thanks very much Dan . I will hit the Apple Store and keep you posted


Add a comment

Add your answer

Steve Gelfand will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 7

All Time: 173