PERFECT SOLUTION - WITHOUT LOOSING UR DATA
I called Apple Support and they shared an easy fix with me. No Time Capsule Backup or USB drive required. If you have a Time Capsule Backup this will also work for that.
Specifically, this was after my computer restarted to install High Sierra, then froze midway, then once I powered off and on again, it became stuck on an endless reboot cycle, where it listed code saying something about 'Kernel' and 'panic'.
Here are the steps:
- If the computer is on, hold the power button until it shuts down completely.
- Find the Command + Option + R keys. Press the power button and then quickly press and hold those keys.
- Wait until you see a globe, then you can release the keys. Choose your WIFI network. Enter the password if necessary.
- Then a loading bar appears and after some time the desktop will come up with a window in the center. There are four options. The first is to restore using a Backup. The second is the one you want, which is "Reinstall Mac OS". I forget the two after that. Anyway. After choosing that, your computer will start updating to the most recent OS version.
It took about three hours for me. It didn't freeze or get interrupted, so I don't know what to do if that happens to you. Otherwise that's it, now the restart bug should be gone and you should have High Sierra or the most recent OS available for your computer. Also, all of my previous data was kept.
OTHER OPTION TO FIX IT - (DATA LOST)
1.Restored my system to earlier one , using TimeMachine
2. Created bootable drive using
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/UNTITLED && say Boot Installer Complete
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