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If you've ever used a large file discovery tool like Daisy Disk, you may have stumbled upon a peculiarly large filed dubbed sleepimage. This file is a by-product of Safe Sleep and it's basically a saved state of your Mac's memory when it goes to sleep. MacBooks especially use this file to save your contents before the battery completely loses its charge. When you start up your system, the Mac will restore this data from the sleepimage file. Regardless of how important this file may sound, it's actually completely unneccessary. So why not free up some hard disk space by eliminating it? Read on to find out how. The file may be unecessary for some (and this feature certaintly wasn't included on Macs made before 2005), but if you are constantly in a situation where you lose juice and your MacBook has to hibernate, you may not want to disable the Safe Sleep feature. Disabling the Safe Sleep feature means that contents in RAM will not be backed up to the drive should your Mac need to hiberna