I came across someone a post with a link to a forum where this was presented as a solution if you lose access to admin accounts on your Mac.<p>This was 2 weeks ago and dude who discovered it thought it was a feature - https://forums.developer.apple.com/thread/79235 (scroll to bottom of page)
Link - <a href="https://forums.developer.apple.com/thread/79235" rel="nofollow">https://forums.developer.apple.com/thread/79235</a> (scroll to bottom of page)