hibernatemode is set to 0 for plain sleep (desktops), 3 to store a copy of memory to disk and keep memory powered up (laptops), or 25 for full hibernation in which memory is powered down too.ttyskeepawake can prevent sleep when a text input, such as a remote login session, is active.powernap sets whether your Mac will take Power Naps, where supported.standbydelay is the delay in seconds between going to sleep and switching to standby mode.standby sets whether to hibernate when a Mac has been asleep for a set period this writes memory to disk and powers down memory.gpuswitch sets GPU behaviour during sleep, and appears to be undocumented.halfdim sets whether an intermediate (rather than full) dimming is used for display sleep.autorestart sets whether your Mac will automatically restart when power loss has occurred and power has been restored.womp is 1 if you want your Mac to wake when it receives a ‘magic’ network packet, which is the same as wake for network access in the pane.sleep is the time in minutes to system sleep 0 means never.disksleep is the time in minutes before hard disks are spun down and put to sleep 0 means never.displaysleep is the time in minutes before the display is put to sleep 0 indicates that the display is never put to sleep.The meaning of these settings is generally obvious:

Normally that is set to 0, which preserves the key, but if you want to secure your encrypted hard disk, you will probably want to set it to 1: then waking it from hibernation will require the user to enter the FileVault passphrase, and if they fail to do so, they cannot try to recover the key from memory. There is an additional system-wide power setting, DestroyFVKeyOnStandby, which determines whether the FileVault key is destroyed when your Mac goes into standy or hibernate mode. Macs differ in their power management capabilities, so the first command that you’ll need is The best way to gain full access, whether you’re trying to fix your Mac’s aberrant sleeping habits, or tweak something crucial, is to use pmset at the command line. Even desktop models have more than a dozen different controls to determine their sleep and related behaviours. The Energy Saver pane in System Preferences does not give you full access to all the capabilities of your Mac.

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