Model A1311 / Late 2009 / 3.06 or 3.33 GHz Core 2 Duo processor

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No HD recognized after install

My iMac HD died so I bought and replaced following the instructions on this site. Upon completion I started up and got folder with ? I started up in startup disc and tried to install new OS X from startup disc. There is no HD to select from to install OS X. HD is visible in Disc utility first aid. Any thoughts on how I proceed?

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Chosen Solution

Use Disk Utilities to format the drive before trying to install a system.

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Go over your HD cable connectors again. Many times connections (connectors) that were thought to be right turned out to be lose.

Check the specks of the HD you used. Your machine is set up for SATA II (3Gb/s) drives. If you put in an auto sensing 6Gb/s drive it may not be working and you might have to manually set jumpers to slow it down to where your box can talk to it.

If this answer is acceptable please remember to return and mark it accepted.

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I also have the problem of an unrecognized HD. I will check my HD cables again tonight.

I may also have to change the jumpers to slow it down because the new HD is a SSD 6GB/s and the old one was a normal 3GB/s drive. They both are Seagate drives.

Hope this works.

Bart

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Problem solved! Must of been a cable connector problem. No need to change jumpers, Autosensing did its job.

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mdomagala will be eternally grateful.
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