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Newly installed Hard drive unrecognizable in late 2012 iMac

I'm attempting to Internet recover on my 21.5 in late 2012 imac. I installed a new hard drive, the WD blue 1TB. It will not recognize that a new hard drive is there to rinstall Mountain Lion. I have looked in the disk utility to try to choose how to partition the drive, but no drive comes up. I made sure all the connectors were firmly in place before re-adhering. At the moment I'm installing OS X onto my external MyBook.

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3 Comments:

how did you boot to get to Disk Utility? Please give us th model number of your new drive. Why are you replacing the drive?

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My old drive failed. But once OS X was installed on my external and booted up, I was able to partition my internal and then update with Mavericks from there.

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Please give us the model number of your new drive if you still can't see it.

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