My all new MacBook Pro was on the battery, and warned me that the battery was almost finished. I left the Mac take care of himself. Later, I plugged the Mac and I pressed the button Power. Hearing the startup sound made me frosty. The Mac had shut down !
When my venerable old MacBook Pro runs out of battery, he goes safely into hibernation, and, when later I plug him and press the button Power, I have the white bars advancing on the screen and everything I had comes back to life ! This is very nice. How to have my new MacBook Pro do the same when he runs out of juice ?
On my new MacBook Pro, I have Mavericks.