How to unmount drives automatically when closing a Mac’s lid

A little Mac app can help attached drives when you put your laptop to sleep.

jettison mac icon

Andre LaRiviere asks:

Is there a way to avoid having the drives “unmount” when I (forgetfully) close the top? It’s a small thing, but it’d be very happy to avoid force ejecting and remounting.

It’s such a reasonable and common bit of behavior, it’s surprising Apple hasn’t built in some version of this. Fortunately, the ecosystem has provided: Jettison, a $5 app from St. Clair Software, prevents your Mac from sleeping until it’s unmounted drives. You can then disconnect them as soon as you see the laptop enter sleep mode. It can also remount drives automatically when waking from sleep if they weren’t removed.

Ask Mac 911

We’ve compiled a list of the most commonly asked questions we get, and the answers to them: read our super FAQ to see if you’re covered. If not, we’re always looking for new problems to solve! Email yours to mac911@macworld.com including screen captures as appropriate. Mac 911 cannot reply to email with troubleshooting advice nor can we publish answers to every question.

To comment on this article and other Macworld content, visit our Facebook page or our Twitter feed.
Shop Tech Products at Amazon
Notice to our Readers
We're now using social media to take your comments and feedback. Learn more about this here.