These cables have a bad track record of failing. Here's the IFIXIT guide: MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement. You'll need to replace the HD SATA cable. If its the equal or you have something newer then what the T/N has then you're OK. You'll need to us an external boot drive (USB thumb drive or your external case with your new drive in it) to copy off from the other system the firmware updater and then run it on your system. Follow this Apple T/N: About EFI and SMC firmware updates for Intel-based Mac computers. OK here's my list of things to do:Ĭheck your systems firmware to make sure its the newest. So that points us to something within your system that needs looking at. So we know the drive is OK as you can prep it up externally on a second Mac. Before I do that, I'd welcome your advice. Īny advice on what to try? My only thought is to uninstall the drive, initialize it as an external disk on another machine, and re-install. Wiping volume data to prevent future accidental probing failed. Press Done to continue." The details tell me the following: Unmounting disk. The message I receive is "Erase process has failed. I've tried to reformat using the Erase function (choosing Format: OS X Extended (Journaled) and Scheme: GUID Partition Map) without success. Running First Aid is Successful (whatever that means.). Other details are: Location-Internal, Capacity-1TB, Connection-SATA, Child Count-0, Partition Map-Not Supported, Type-Disk, SMART Staus-Verified, Device-Disk0. That (magically) has allowed me to get to Disk Utility and see what is happening.ĭisk Utility tells me the drive ST1000LM014-1EJ164 Media is Uninitialized.
However, I have an external USB flash drive 8GB with El Capitan installer mounted as external drive.
Have been getting the flashing folder with ? mark. Just installed a 1TB Drive but neglected to initialize before installation.
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