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missing hd drive

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    Accidentally shut down MacBook Pro while installing MacOS Sierra and now computer won't reboot

    Hello! I'm a huge idiot and a newbie to Mac products (A longtime user of Windows here) but I need help since I accidentally shut down my MacBook Pro while it was updating to MacOS Sierra!! HUHUHU After shutting it down, I noticed everything was normal until I logged in and booted up normally...