pmset: selecting the sleep mode in Mac Os X

• from http://www.fscklog.com/2008/02/schnellschlaf-s.html:

To select one of the different sleep modes of the Mac use the command-line tool pmset:

• To show the current settings:

  pmset -g

• The hibernatemode can be 3 (default: safeSleep, i.e. the RAM content is also written to disk when the lid is closed), 0 (pure RAM sleep), 1 (pure deep-sleep). Turn the safeSleep off:

  sudo pmset -a hibernatemode 0