I am using mac os x snow leopard. Is there a way to hibernate? also any keyboard shortcut?
marked as duplicate by Martín Marconcini, ghoppe, bmike♦, Philip Regan Oct 7 '11 at 9:34
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Depending on your Mac model and OS X version, you might check out Deep Sleep, a dashboard widget that gives you more control over the sleep/hibernate behavior. This Macworld article goes into more detail about what's going on behind the scenes.
Mac OS X (from 10.4) after going to sleep will write the memory content to disk (safe sleep). After the blinking white led stops the "hibernate operation" will be completed.
If power is still available your Mac will wake up instantaneously from memory. If power (and the memory content) was lost your Mac will take a little time more to wake up (from hibernation) since the memory content has to be read from disk.