i cannot log into my computer after restarting it while on an app
i cannot log into my computer after restarting it while on an app. it sends me to a blank screen. what do i do?
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MacBook Air 13", macOS 10.13
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Press and hold the power button for as long as a quarter minute to emergency power off.
Restart and see how far through the boot-up sequence you get, and report your results.