bash-3.2$ man pmset
...
SAFE SLEEP ARGUMENTS
hibernatemode takes a bitfield argument defining SafeSleep behavior.
Passing 0 disables SafeSleep altogether, forcing the computer into a reg-
ular sleep.
0001 (bit 0) enables hibernation; causes OS X to write memory state to
hibernation image at sleep time. On wake (without bit 1 set) OS X will
resume from the hibernation image. Bit 0 set (without bit 1 set) causes
OS X to write memory state and immediately hibernate at sleep time.
0010 (bit 1), in conjunction with bit 0, causes OS X to maintain system
state in memory and leave system power on until battery level drops below
a near empty threshold (This enables quicker wakeup from memory while
battery power is available). Upon nearly emptying the battery, OS X shuts
off all system power and hibernates; on wake the system will resume from
hibernation image, not from memory.
hibernatemode is set to 3 (binary 0011) by default on supported porta-
bles.
hibernatemode is set to 0 (binary 0000) by default on supported desktops.
ger en förklaring till att det går. Sedan har jag dessvärre ingen aning om det finns snyggt program med GUI som ändrar detta åt dig på annat sätt än via kommandoraden. Kolla kanske MacUpdate.com?