#Mac disk utility partition greyed out high sierra how to
#Mac disk utility partition greyed out high sierra mac os x
#Mac disk utility partition greyed out high sierra mac os
#Mac disk utility partition greyed out high sierra install
#Mac disk utility partition greyed out high sierra full

#Mac disk utility partition greyed out high sierra install

The above will install the original OS X that came with your computer from the factory is you use the proper shortcut keys as provided in Step 1. To install the original factory version when the computer was new use Command-Option-Shift-R.) (To install the version of OS X that was currently installed use Command-Option-R. Immediately after the chime hold down the Command-Option-SHIFT-R keys until a globe appears.

#Mac disk utility partition greyed out high sierra full

You would either need a copy of the Sierra full installer application or re-download the installer from the Purchases page in App Store or have made a bootable flash drive installer for Sierra. Then you need have a way to install Sierra. You cannot downgrade without first erasing the drive. Use Command-Option-Shift-R to install the original factory version when the computer was new. Use Command-Option-Rto install the version of OS X that was currently installed. Select Reinstall OS X and click on the Continue button.Quit Disk Utility and return to the Utility Menu.Click on the Apply button, then click on the Done button when it activates.

#Mac disk utility partition greyed out high sierra mac os

Set the Format type to Mac OS Extended (Journaled.).Click on the Erase tab in Disk Utility's main window.

Mac data recovery software is also introduced here.

#Mac disk utility partition greyed out high sierra how to

When Disk Utility loads select the drive (usually, the out-dented entry) from the side list. This post shows you how to use Disk Utility on Mac to partition, wipe, repair, restore, and copy a drive.Select Disk Utility and click on the Continue button.The Utility Menu will appear in from 5-20 minutes.Immediately after the chime hold down the Command-Option-R keys until a globe appears. Hopefully I will atleast be able to retrieve files from the HD if all else fails.Are you sure the SSD is locked? What do you find in Disk Utility? From what are you attempting to reinstall Sierra? Exactly how did you erase the SSD and try reinstalling macOS?Р”В¬lean Install of El Capitan or Later on a Clean Disk At the moment I can't boot into the OS and can only boot into recovery mode or single user mode. I need help deleting the BOOTCAMP partition and merging with the greyed out Mac HD partition so that I can run fsck to hopefully restore my mac os to working order. This is as far as I got through searching for solutions online. The volume with PID 0 from the list provided by diskutil list is called GUID_partition_scheme. Now I tried to unmount the disk using that command and even with the force wildcard but it said: Forced unmount of disk0 failed: at least one volume could not be unmounted So I did some research and found another post on AskDifferent that explained how to delete a partition from terminal (in recovery mode) by first unmounting the physical disk using diskutil unmountDisk /dev/disk0 and then deleting the partition using gpt remove. However the option to delete the BOOTCAMP partition is disabled in Disk Utility. So what I thought I could try is delete my BOOTCAMP partition, which is about 100GB, and then merge the free space into the problem partition so that I can run fsck -fy in single user mode to try to repair the volume which now will have enough space to complete the operation.

#Mac disk utility partition greyed out high sierra mac os x

Now the disk is greyed out in disk utility and I can't reinstall mac os x because I would need to erase all of the data on the drive and I don't want to lose the files I have on it.

Sorry I didn't get any screenshots or anything but that is basically what happened. Solution: The right way you should follow when selecting a partition option is to choose the drive name within the list provided under Internal or External (depending on the device you want to partition). (I had about 13GB of free space at this time) In most cases, users choose the wrong partitioning option, and as a result, the Partition option in Disk Utility remains grayed out. Then it tried to restore the disk to it's original state on mount but it couldn't do this either, I'm guessing because of lack of disk space. So I opened in recovery mode and ran the first aid and it tried to fix the B-Tree of the catalog file, however there wasn't enough disk space to do this. I was trying to repair permissions today on my Mac so I ran the Disk Utility's First Aid on my drive and it said that there was an Invalid Index Key and that my disk was corrupt and I needed to run the first aid in Recovery mode.