Alternatively, hold the power button for 5 seconds to shut down your MacBook Pro, wait 15 seconds and then press the button again to reboot. And troubleshooting a Mac is usually very simple. Pressing Control + Command (the symbol with four loops) + Power/Eject/Touch ID button (depending on your model) should automatically restart your device. I never had any major problems with Mac computers. Hopefully, one of the solutions above will help you. Now exit single-user mode by typing reboot then press Return.Enter rm /private/var/db/.AppleUpgrade and press Return.Enter rm /Library/Preferences/ist and press Return.Enter rm /Library/Preferences/ and press Return.Then enter: /sbin/mount -uw / and press Return.Now run a disk check by typing: /sbin/fsck -fy and press Return.You have to enter them exactly as shown below (pay attention to the spaces): Press and hold the Command + S keys while turning on the Mac.Start your Mac in single-user mode by following these steps:.If you are still having the issue, then try the steps below:.Then try restarting your Mac without pressing any keys.Release the Shift ket when the login window appears.Start your Mac and press and hold the Shift key while it boots.Reset SMC (System Management Controller).Once you hear the boot sound again, release the keys.
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