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Jettison automatically ejects external drives from your Mac before your computer goes to sleep.
Simplify those last few seconds when you grab your MacBook and run out the door. Simply close the lid and Jettison will automatically eject your backup drive, iPod, or whatever else is connected so you can safely unplug it. Say goodbye to "disk was not ejected properly" errors and your computer backing up because you forgot to eject everything.
Jettison even ensures that Time Machine backups and file server volumes are properly unmounted before deleting them. Your backups and shared files are safe and sound.
What if you decide not to leave and open your MacBook again? Jettison will check to see if your drives are connected and will connect them back if they are there.