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I've just installed a new 500GB hard drive in a 2009 MacBook Pro and then cloned a clean install of OS X 10.7 on to the new drive.

I then updated to 10.7.5, and when I shut the MacBook Pro down the machine just restarts.

Any solutions anyone?

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Based off the replies in the comments, this is what I suggest doing:

In terminal, type the following command:

cd /Library/Preferences/SystemConfiguration/

sudo rm com.apple.PowerManagement.plist

sudo rm com.apple.AutoWake.plist

(Do the "rm" commands separately). Note: com.apple.AutoWake.plist might not exist. Then, shut down your mac, if it re-starts, just shut it down again and hopefully everything will be ok.

I hope this works.

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