I learned that the retina MacBook Pro has a Deep Sleep Mode that is initiated when left idle for a long time. This, however, causes my laptop to take about 3-5 seconds to wake up after it sleeps, such as opening the lid.

Can I disable this Deep Sleep Mode?

I would also like to know the advantages/disadvantages of disabling it. Does it really save that much power? I would rather have a faster wake up time than saving 1% of battery or something.


To disable deep sleep, run the following command in Terminal:

sudo pmset -a standby 0

This is a description of "standby" (deep sleep) from the pmset man page:

 standby causes kernel power management to automatically hibernate a
 machine after it has slept for a specified time period. This saves power
 while asleep. This setting defaults to ON for supported hardware. The
 setting standby will be visible in pmset -g if the feature is supported
 on this machine.

 standby only works if hibernation is turned on to hibernatemode 3 or 25.

 standbydelay specifies the delay, in seconds, before writing the hiberna-
 tion image to disk and powering off memory for Standby.

Battery savings depend on how much time your Mac spends in standby. While in standby mode, your Mac consumes 0 power, it's as if it is shut down (note: not taking Power Nap into consideration).

My personal recommendation would be to set the "standbydelay" value to something bigger. 2 hours, for example. This means that if you open the lid back in less than 2 hours, your Mac would be in regular sleep and wake up instantly. If longer than 2 hours, your Mac would enter standby mode and consume no power, and waking up will take a bit longer.

Example for 2 hours:

sudo pmset -a standbydelay 7200
  • Thanks. Does it save a great deal of power ? Do you know how much percent would I lose by deactivating it ? Basically what are the disadvantages of turning it off ? – Render Aug 14 '12 at 11:20
  • I've edited my answer to add a bit more detail about this. – bogdansrc Aug 14 '12 at 13:18
  • Thank you very much. Can you also add the code to change the default value back ?? Is it 1 hour ? Also, does sudo pmset -a standby 1 re-enable standby mode ? – Render Aug 14 '12 at 15:44
  • Yes, sudo pmset -a standby 1 re-enables standby mode. I have no idea what the default value for standbydelay is. – bogdansrc Aug 14 '12 at 16:54
  • It was 4200 on my MacBook Air. Apple's KB article says that The standby mode activates after just over an hour of "regular" sleep.. – Lri Aug 17 '12 at 11:05

You must log in to answer this question.

protected by bmike Sep 24 '13 at 16:42

Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).

Would you like to answer one of these unanswered questions instead?

Not the answer you're looking for? Browse other questions tagged .