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I am trying to install OS X 10.4.6 on an iBook.
I am installing from a DVD copy made by the local apple store.

The "Checking your installation DVD" part completes without errors.

During the install it stops and says:
BomFatalError - cpio read error: bad file format
Install failed: some files for BSD may not have been written correctly

I've tried this several times, always with the same error.

In the Disk Utility - First Aid tab, I tried Verify Disk and Repair disk, both which fail with "Could not unmount disk"

I also tried Verify Disk Permission and Repair Disk Permissions, both of which complete successfully.

Then I tried to erase the disk (1 pass), and it says:
Zero Disk failed with error
Could not unmount disk.

What else can I do?

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Last Post by jingda
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I agreed with hercx. Since you went to this utility and try repair and verify disk permission it seems ok. The problem is you can't unmount it. First are you an administrator or root user. Second the disk 10.4.6 is an old version try a newer version. And why are you trying to install osx on an ibook. Do you know what is an ibook. Do not replace your hard drive first.

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