- http://www.karthikk.net/2011/12/put-mac-os-x-lion-in-hibernate-deep-sleep-mode-how-to/
- https://www.lifewire.com/change-mac-sleep-settings-2260804
- man pmset [link]
$ sudo pmset -a hibernatemode 25
$ sudo pmset -a hibernatemode 3
$ sudo pmset -a hibernatemode 0