Mac book won't start

My Mac book is stuck on the start loading screen

You have a serious problem with that drive. You could try running DiskWarrior on it, but if that doesn't work, you will need to reformat the drive. I hope you had it backed up!
-Bmer
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Similar Messages

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    Login to another User account. Is it faster there?   
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    Got problems with your Apple iDevice-like iPhone, iPad or iPod touch? Try Troubleshooting 101

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    Welcome to Apple Support Communities
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