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Used the machine yesterday and this morning on startup, only see the macOS Utilities window. Have tried the reinstall but get nowhere because of a "Locked Disk". Tried the suggestions to fix that but also did not work. Any suggestions would be helpful. I have no desktop coming up, so no access to anything. Just have Safari. Thanks!
iMac 21.5″, macOS 10.13
Try booting into Safe Mode by booting with the Shift key held down and check there to see if the problem persists. Reboot normally and test again.
NOTE: Safe Mode boot can take up to 10 minutes as it's doing the following;
• Verifies your startup disk and attempts to repair directory issues, if needed
• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)
• Prevents Startup Items and Login Items from opening automatically
• Disables user-installed fonts
• Deletes font caches, kernel cache, and other system cache files
Next, if necessary, boot into the Recovery volume (boot with the Command + R keys held down), select the Disk Utility and run Disk First Aid on the hard drive. Then try booting up and see if it will.
Do you have a current and full backup of your hard drive? If you do and the above doesn't help boot again into Recovery volume and reinstall the system.
Try booting into Safe Mode by booting with the Shift key held down and check there to see if the problem persists. Reboot normally and test again.
NOTE: Safe Mode boot can take up to 10 minutes as it's doing the following;
• Verifies your startup disk and attempts to repair directory issues, if needed
• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)
• Prevents Startup Items and Login Items from opening automatically
• Disables user-installed fonts
• Deletes font caches, kernel cache, and other system cache files
Next, if necessary, boot into the Recovery volume (boot with the Command + R keys held down), select the Disk Utility and run Disk First Aid on the hard drive. Then try booting up and see if it will.
Do you have a current and full backup of your hard drive? If you do and the above doesn't help boot again into Recovery volume and reinstall the system.
Need to repair start up disk on iMac running High Sierra
