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mrplow

 
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Member Since: Oct 01, 2007
Location: UK
Posts: 6,728
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I'm not sure I can add any more but at the moment you don't know where the problem is. Installing on an external would help isolate the issue. If it works ok running osx from the external then the internal drive is the issue.
If the problem remains it's the other internals and you'll need further diagnostics/trip to an engineer

External hard disk acquisition addict - but admitting the problem is the first step to a robust backup

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