It seems Apple may have changed something in the latest SSD-based notebooks and/or Mountain Lion? I have "safesleep" disabled currently: $pmset -g | grep hibernatemode hibernatemode 0 The default for laptops is "3" which writes an 8GB or 16GB image of RAM contents to disk, depending on how much RAM you have installed. Once you set it 0 you're supposed to be able to delete the sleepimage file and it never comes back. More info here: http://www.tuaw.com/2011/08/22/why-hibernate-or-safe-sleep-mode-is-no-longer-necessary-in-os/ However, even with hibernatemode 0, the "sleepimage" file keeps getting re-created upon reboot or resume from sleep. On my other mac laptops, the file isn't recreated again once its deleted. Anybody else with a rMBP (or 2012 Air) try this?