When you’re ready, click the Download button at the upper left. This should bring you to the High Sierra section of the App Store, and you can read Apple’s description of the new OS there.You can also do a search, but you’ll probably find it in the top marquee carousel or somewhere in the Features section of the store. Look for macOS High Sierra in the App Store.Launch the App Store app, located in your Applications folder.You should be able to delete the original user now. Run diskutil apfs updatePreboot in Terminal.

In the pop-up window find the row 'BDS device node', copy the value and run the below command.

click on the info icon in the top right of the window.

open spot light search (cmd+space) type Disk Utility.

Identify the BDS device node value by following the below steps.

Find your new/main user account > GeneratedUID, paste in the one copied above.

Find the GeneratedUID field on the right and copy it somewhere safe.

Search to find the user you can’t delete - the original user that was logged in when upgrading to High Sierra. (You may need to Enable Root User in Edit menu.)

System Preferences > Login Options > Join… > Open Directory Utility….

Also, do not come crying to me if it totally hoses your machine. Warning, I have no idea of the side effects this might have, but so far so good for me.

After trying everything else, this is the solution shared in one of the replies that worked. I found this thread on the Apple forums with people having the same problem. I mean, I tried every possible way, and it wouldn’t couldn’t. And I don’t mean “you don’t know how to delete accounts” couldn’t. So I created a temp “admin” account to do the upgrade, then do the migration with Migration Assistant.Īll seemed okay, but when I went to delete the original user account, I couldn’t. The old one was on High Sierra, but the new one wasn’t. I recently migrated to a new MacBook Pro. Can’t Delete Original Admin User on macOS High Sierra Reference: Medium Article by Ambrose Little

What is macos high sierra can i delete