Good morning everyone, I noticed that when I turn off my macbook pro 2017 model a1708 it freezes and quickly flashes green at the top of the screen sometimes when it's time to turn it off, it's working perfectly but as I'm going to sell it I noticed it and not I want to pass him on with a problem, can someone help me? I take a print when flash this green light when shut down, in secure mode this doesnt happens