>>speckx+(OP)
I also have a MacBook that does not sleep. You click on the sleep button in the menu and nothing happens. You shut the lid and nothing happens. If I have anything running when I finish for the day I'll wake up to a completely dead laptop. Like dead as in time lost, clock is 12:00. I was hoping this post might provide some helpful tips, but sadly not. Definitely going to use this tool in the future.
It's a really nice machine (128GB ram, 4TB machine). The default for devs here is to get re-use units (ie laptops that people returned or were store demos). Part of me wonders if this laptop was returned for a reason.