The MacBook family was first introduced in May 2006 and replaced the iBook as Apple's consumer laptop.

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Apple logo at starup but no louding wheel

At startup shows apple logo, after few minutes it goes to folder with question mark. I try to install MacOS CD but dont work, try reboot on single user mode and shows a "mach_kernel" error (0x80000012) Does this means my HD is fry or there is another hardware problem? Thanks for any help, I like to fix it.

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This points to a failing HDD. Have a look at this discussion.

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Julio C Collazo will be eternally grateful.
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