Hi so I have a MacOS High Sierra it’s a late 2015 one and it’s 10.13.6 version. My dad got this computer and it was barley used and he was the one that set up the whole computer and he made the administrator password to him and not me. I’m trying to delete his account so I can be the administrator I’ve looked at videos on YouTube and none of them are a macOS so this was my last resort so please if anyone can help that would be great thanks!
iPhone 8, iOS 16
Is your Dad no longer around? If he is the ideal solution would be to have him create a brand new Admin account for you, or to change your existing Standard account to one with Admin privileges: Add a user or group on Mac - Apple Support.
Another option, if he agrees to transfer ownership of that Mac to you: What to do before you sell, give away, trade in, or recycle your Mac.
If your Dad is no longer around then the only real solution is to erase that Mac and upgrade it to the latest macOS version available. To do that, start with Use Disk Utility to erase an Intel-based Mac - Apple Support. When reinstalling macOS, choose this startup key chord that will offer the latest version of macOS compatible with that Mac — probably macOS 12 "Monterey".
That procedure is described in How to reinstall macOS - Apple Support, under "If you're using any other Mac."
For reasons that are not entirely clear reinstalling macOS "High Sierra" is no longer an option.
Is your Dad no longer around? If he is the ideal solution would be to have him create a brand new Admin account for you, or to change your existing Standard account to one with Admin privileges: Add a user or group on Mac - Apple Support.
Another option, if he agrees to transfer ownership of that Mac to you: What to do before you sell, give away, trade in, or recycle your Mac.
If your Dad is no longer around then the only real solution is to erase that Mac and upgrade it to the latest macOS version available. To do that, start with Use Disk Utility to erase an Intel-based Mac - Apple Support. When reinstalling macOS, choose this startup key chord that will offer the latest version of macOS compatible with that Mac — probably macOS 12 "Monterey".
That procedure is described in How to reinstall macOS - Apple Support, under "If you're using any other Mac."
For reasons that are not entirely clear reinstalling macOS "High Sierra" is no longer an option.
How to delete MacOS administrator
