I don't know why wne I put my mac to sleep it will light up it self after a few hour and say that the mac have a problem needs to be shut down, does anyone know why?
Sounds like it's experiencing a kernel panic. Post the latest report. See
About kernel panics,Technical Note TN2063: Understanding and Debugging Kernel Panics,Mac OS X Kernel Panic FAQ, Resolving Kernel Panics, andTutorial: Avoiding and eliminating Kernel panics for more details.
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