Formatted via USB wont boot once installed

Discussion in 'MacBook Pro' started by SirNeiko, Jan 22, 2015.

  1. SirNeiko macrumors newbie

    Jan 21, 2015
    Hello All,

    I have a MacBook Pro that the original HDD failed in. So I bought a new HDD through OWC. Just a 500GB HDD. I plugged it in via a USB adapter to another mac and formatted the drive. I then installed it into the MacBook Pro, plugged in my USB Yosemite Installer and booted it up.

    When I go through the installer process the disk does not show up as a drive that I can install on. When I go into Disk Utility it shows up but all options are grayed out. I cannot erase, etc etc. I took it out and erased it to "free space". Installed it again and still could take no action on the drive from within Disk Utility. I formatted it again to Extended Journaled and still nothing.

    When I click on Get Info it says "Writable: NO". So obviously there is something at play preventing me from using it. Has anyone seen this before?

    Thank you for any help!
  2. alex0002 macrumors 6502

    Jun 19, 2013
    New Zealand
    This comes up a lot when people are installing an SSD in their MBP. If the HDD or SSD works with an external USB enclosure/adapter, but not when installed in the Mac, then the problem could be the internal SATA cable.

    It is also possible that original HDD that "failed", might be o.k. and the SATA cables was the problem all along.
  3. SirNeiko thread starter macrumors newbie

    Jan 21, 2015
    Thanks for the info! I will try replacing the Sata cable to see if that corrected the issue.

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