hibernate on a Mac tested with macOS Ventura 13.1, Monterey 12.0, and Big Sur 11.Powering down a computer while retaining its state You can easily hibernate (or sleep) your Mac using keyboard shortcut, menu and Terminal. sudo pmset -a standbydelayhigh 10800 lets the system hibernate after 3 hours no matter the power supply ( -a is for all). Type your administration password when prompted.Įxamples: sudo pmset -c hibernatemode 3 enables hybrid hibernation for wall power.standbydelayhigh 86400 for the standard 1 day standbydelaylow for the hibernation delay on low battery power Hibernatemode 0, 3 or 25 as above standbydelayhigh for the delay until the system goes into hibernation with “enough” battery left, e.g. Append -b for settings running on battery power, -c for power supply and -u for UPS.How to Change Sleep and Hibernation Settings for your Mac Settings for which mode to use, and when the system goes into hibernation can be changed for battery, power supply and UPS separately. and 24 hours with 50% battery left or more.after 3 hours with less than 50% of batter left.By default, macOS goes into hibernation (mode 25) This is the default for mobile computers (such as MacBook Airs).Īs an additional twist, macOS can start in Hibernatemode 0 and switch to mode 25 after a while to save power. Hibernatemode 3 is both sleep and hibernation: The system state is saved to both disk and memory, and the computer wakes from memory if available or disk if memory has been lost (because, say, the battery was empty and the system had to power down).While slow, this mode saves most power and ensures all data is saved to disk before sleep. Hibernatemode 25 is pure hibernation: The current state is saved to disk when the computer goes to sleep, and memory is turned off.This is the default for desktop computers (such as Mac Pro and iMac). If the computer loses power while asleep, it has to reboot and data not saved to disk is lost. The system state is saved to memory, and the system only wakes from memory. “hibernate” on a Mac (set using hibernatemode): There is one more option for power saving in addition to “sleep” vs. The data is much slower to write and read, so both going to sleep and waking takes longer, but the disk needs no power to hold the data, so you can wake a Mac from hibernation after weeks or months. Hibernate saves the state to persistent hard-disk storage.This memory is fast to access but requires power to keep remembering. Sleep saves the Mac’s state in RAM memory. The main difference between Mac “sleep” and “hibernate” is where data is stored: Let’s find out more: How to Understand Hibernation vs. On your Mac, you can trust its sleep to the hard disk’s spindles-or to memory, of course. You can trust your sleep to the spindles. So, no need to go overboard with sleep hygiene and banish all potential disruptions. The K-complex occurs when you hear a noise, for example, and the sleep spindle‘s one proposed function is altering how this noise information is processed-so you don’t wake up. You can trust your sleep to the spindles.ĭuring phase 2 sleep (which is typically the major part of sleep), one pattern commonly seen in EEGs measuring electrical brain activity is a K-complex followed by a sleep spindle. First, Knowing This Will Help You Sleep Better hibernation on a Mac, and how to choose between the two (or a combination) using hibernatemode. Looking to save a maximum of energy and make sure your data is safe? Want sleep and wake to be immediate and save time? Find here what you need to know about sleep vs.
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