Make sure all connected drives are unmounted when you put your Mac to sleep. Access a set of settings for personalizing drive management. Eject individual devices or all of them upon shutdown, restart, or system launch. Work with hard disks, DVDs and CDs, disk images, network drives, or SD cards.
Download of Jettison 1.9.6 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The bundle id for this app is com.stclairsoft.Jettison.AppStore. You can launch this program on Mac OS X 10.6 or later.
Jettison for Mac belongs to System Tools. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This Mac app is a product of St. Clair Software. The most popular versions of Jettison for Mac are 1.4, 1.2 and 1.0.
From the developer:
Jettison eliminates the hassle of manually ejecting external drives before you put your MacBook to sleep.
With Jettison, you just close your MacBook, unplug and go.
You may want to check out more software for Mac, such as Extreme Landings, which might be related to Jettison.