MacBookをスリープした時に USBへの給電をオフにする方法

$ pmset -g | grep hibernatemode

$ sudo pmset -a hibernatemode 25

supports values of 0, 3, or 25. Whether or not a hibernation image gets written is also dependent on the values of standby

・ = 0 by default on desktops.
The system will not back memory up to persistent storage. The system must wake from the contents of memory; the system will lose context on power loss. This is, historically, plain old sleep.

・ = 3 by default on portables.
The system will store a copy of memory to persistent storage (the disk), and will power memory during sleep. The system will wake from memory, unless a power loss forces it to restore from hibernate image.

・ = 25 is only settable via pmset.
The system will store a copy of memory to persistent storage (the disk), and will remove power to memory. The system will restore from disk image. If you want "hibernation" - slower sleeps, slower wakes, and better battery life, you should use this setting.

 /* Check for supported Hibernate Modes */
 #define kNoOfSupportedHibernateModes 3
 #define ARG_SUPPORTED_HIBERNATE_MODE1 "0"
 #define ARG_SUPPORTED_HIBERNATE_MODE2 "3"
 #define ARG_SUPPORTED_HIBERNATE_MODE3 "25"