I have MAc book pro 15-inch, Early 2011 , I want to check my hardware , but when I hold the D key , nothing happened
what should I do , if I want to check my hardware?
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Insert the Applications DVD that came with the computer and press D key when your Mac starts up
Try option d.
This will attempt to load an Internet version of Apple Hardware Test.
If this still does not work, you must boot from your original Applications DVD. It is the one bearing the text "AHT version xxxx" on it.
Retrieving data ...