iMac won't restart?

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  • organicgrid0

    Starting up in Safe Mode

    Follow these steps to start up into Safe Mode.
    • Be sure your Mac is shut down.
    • Press the power button.
    • Immediately after you hear the startup sound, press and hold the Shift key. The Shift key should be pressed as soon as possible after startup, but not before the startup sound.
    • Release the Shift key when you see the Apple logo appear on the screen.

    After the Apple logo appears, it may take longer than usual to reach the login screen. This is because your computer is performing a directory check as part of Safe Mode.

    To leave Safe Mode, restart your computer without pressing any keys during startup.

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