Model A1174 with 2 GHz Core Duo or Model A1207 with 2.16 or 2.33 GHz Core 2 Duo

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OS X Won't Boot

Disk Utility Report:

Verify volume "Macintosh HD"

Checking HFS Plus volume

Checking Extents Overflow file

Checking Catalog file

Invalid sibling link(red)

The volume Macintosh HD needs to be repaired(red)

Error: The underlying task reported failure on exit(red)

1 HFS volume checked

Volume needs repair (red)

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Chosen Solution

Your drive may need to be reformatted using the write zero option to map out any bad blocks. This does erase all the data.

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Try TechTool Pro for macs if you've already tried all of the usual fixes

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Cedric will be eternally grateful.
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