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Apple Computing Products:
macOS - Operating System
unable to format harddrive
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<blockquote data-quote="MacInWin" data-source="post: 1634552"><p>About all you can do is to do a repartition/reformat of the ENTIRE drive, not just the OS X partition, if you can do that. That will kill your BootCamp partition as well as the OS X partition. Chscag may be right about the HD failing, but if you can boot Windows and Recovery, it's more likely that the partition table is screwed up and it cannot format just the OS X partition because it can't find it. That CAN be a hardware issue, but it can also be a software screwup. If you try to format the entire drive and still get the error, then the drive is most likely dead or dying.</p></blockquote><p></p>
[QUOTE="MacInWin, post: 1634552"] About all you can do is to do a repartition/reformat of the ENTIRE drive, not just the OS X partition, if you can do that. That will kill your BootCamp partition as well as the OS X partition. Chscag may be right about the HD failing, but if you can boot Windows and Recovery, it's more likely that the partition table is screwed up and it cannot format just the OS X partition because it can't find it. That CAN be a hardware issue, but it can also be a software screwup. If you try to format the entire drive and still get the error, then the drive is most likely dead or dying. [/QUOTE]
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Apple Computing Products:
macOS - Operating System
unable to format harddrive
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